Thameslink engineering works (October 2026)

We'd recommend hitting CTRL+F on this page and typing in any relevant station or route pages for your planned travel to check if there are any planned disruptions upcoming.

• London Bridge disruption – Major works at London Bridge will affect Thameslink services, with many trains diverted and unable to call at the station. Some routes will run via alternative lines with amended timetables and longer journey times.
• Cambridge and Hertfordshire route closures – Engineering works will affect services around Cambridge, Stevenage and Peterborough, with replacement buses operating on some routes.
• Kent route early morning closures – Very early morning engineering works between Gravesend and Gillingham will require replacement buses on some Thameslink services.

Engineering work is taking place overnight in the Stevenage area, closing some lines. Between 23:55 and 05:05 each night, buses replace trains between Stevenage and Royston / Cambridge.

Engineering work is taking place between Gravesend and Gillingham (Kent), closing all lines very early on Tuesday to Friday mornings.

Between approximately 00:25 until 04:25 on Tuesday to Friday mornings, buses will replace trains between Gravesend and Gillingham.

Engineering work is taking place between Bromley South and Sevenoaks, closing all lines via Swanley overnight. As a result, the 23:46 London Blackfriars to Sevenoaks service will be diverted via Orpington and not call at St Mary Cray, Swanley, Eynsford, Shoreham, Otford or Bat & Ball. A replacement bus will run from Bromley South to Sevenoaks, serving these stations.

Engineering work is taking place overnight at various locations between Finsbury Park and Peterborough, closing some lines. The 23:11 Horsham to Peterborough service will terminate at Finsbury Park. A rail replacement bus will run between Finsbury Park and Peterborough.

Engineering work is taking place overnight between Gravesend and Gillingham (Kent), closing some lines. From the end of Saturday service (approximately 01:15 Sunday) until approximately 06:15 Sunday, buses replace Thameslink trains between Gravesend and Gillingham (Kent).

Engineering work is taking place in the early hours between Brighton and Haywards Heath, closing some lines. The 04:12 Brighton to Bedford service will start from Haywards Heath at 04:26. A rail replacement bus will run from Brighton at 03:41 to Haywards Heath, connecting with the train.

Engineering work is taking place overnight between Three Bridges and Brighton, closing some lines. From the end of Saturday service (approximately 01:25 Sunday morning) until 07:15 Sunday morning, buses will replace trains between Three Bridges and Brighton.

Engineering work is taking place at various locations between Peterborough and Potters Bar until 07:00, closing some lines. Until approximately 07:00 on Sunday, buses replace trains between Peterborough and Potters Bar.

Engineering work is taking place overnight between Three Bridges and Brighton, closing some lines. Buses will replace end of service / early morning Thameslink service between Three Bridges and Brighton.

On Monday, Tuesday, Thursday and Friday evenings, the 23:44 Bedford to Brighton service will terminate at Three Bridges. This train will run as normally advertised on Wednesday.

On Tuesday, Wednesday and Friday mornings, the 04:12 Brighton to Bedford service will start from Three Bridges. This train will run as normally advertised on Thursday.

Engineering work is taking place between Dartford and Rainham (Kent), closing all lines overnight from Monday evening until Friday morning. Between 23:25 and 04:20 each night, buses will replace trains between Dartford and Gillingham (Kent) / Rainham (Kent).

Engineering work is taking place between Herne Hill and Streatham, closing all lines overnight from Monday evening until Friday morning. Between 00:25 and 05:35 on Tuesday to Friday mornings, no trains will run between Herne Hill and Sutton.

Monday to Thursday

• The 22:54 Luton to Sutton service will terminate at Herne Hill.

Tuesday to Friday

• The 05:46 Sutton to St Albans service will start from Elephant & Castle.

• Paper rail tickets will be accepted at no extra cost on London Buses to / from Sutton.

Engineering work is taking place overnight in the Redhill area, closing some lines. From the end of service on Monday to Thursday evenings (approximately 00:25 Tuesday to Friday) until approximately 04:30 on Tuesday to Friday mornings, no Thameslink trains will call at Redhill. Your tickets will be accepted at no extra cost on Southern rail replacement buses between Purley and Horley.

Engineering work is taking place overnight in the Welwyn Garden City area, closing some lines. From approximately 23:45 on Wednesday and Thursday evenings, until approximately 05:10 on Thursday and Friday mornings. Buses will replace trains between Alexandra Palace and Stevenage via Welwyn Garden City. Trains which run between London and Cambridge / Kings Lynn / Peterborough will divert non-stop via Hertford North with extended journey times.

Engineering work is taking place between Three Bridges and Brighton, closing some lines. At the end of service on Friday, the 23:44 Bedford to Brighton service will terminate at Three Bridges. A rail replacement bus will run between Three Bridges and Brighton.

Engineering work is taking place between Three Bridges and Brighton, closing all lines. Buses will replace trains between Three Bridges and Brighton.

Engineering work is taking place between Kentish Town and Bedford, closing some lines. At the end of Saturday service, a reduced number of trains will run between Kentish Town / West Hampstead Thameslink and Bedford. Please use alternative Thameslink services to reach your destination.

Engineering work is taking place overnight at various locations between Finsbury Park and Peterborough, closing some lines. The 23:11 Horsham to Peterborough service will terminate at Finsbury Park. A rail replacement bus will run between Finsbury Park and Peterborough.

Engineering work is taking place between Gravesend and Gillingham (Kent), closing all lines very early on Sunday morning. As a result, the 01:24 Dartford to Gillingham (Kent) service will terminate at Gravesend. A replacement bus will run between Gravesend and Gillingham (Kent).

Engineering work is taking place between London Kings Cross and Finsbury Park until 08:00, closing some lines. Until approximately 08:00 on Sunday morning, a reduced service will run between London Kings Cross and Finsbury Park. Paper rail tickets will be accepted on London Underground / London Buses between Kings Cross and Finsbury Park at no extra cost.

Engineering work is taking place overnight in the Arlesey area, closing some lines. As a result:

• Southbound trains will be unable to call at Arlesey between approximately 23:30 (Sunday / Monday) and 04:40 (Monday / Tuesday)

• Northbound trains will be unable to call at Arlesey between approximately 01:40 and 05:50 (Monday and Tuesday)

Rail replacement buses will run between Biggleswade and Hitchin.

Engineering work is taking place between Rochester and Rainham (Kent), closing some lines. No Thameslink trains will run between Gravesend and Rainham. Your tickets will be accepted at no extra cost on Southeastern rail replacement buses between Gravesend and Rochester, and between Rochester and Rainham (Kent).

Engineering work is taking place in the West Hampstead Thameslink area, closing some lines. The 09:48 West Hampstead Thameslink to Sutton service will start from London Blackfriars. You should use alternative Thameslink services between West Hampstead Thameslink and London Blackfriars.

Engineering work is taking place between Welwyn Garden City and Hitchin until 08:15, closing some lines. Buses will replace trains between Welwyn Garden City and Hitchin until 08:15.

Engineering work is taking place between Three Bridges and Brighton, closing all lines. Buses will replace trains between Three Bridges and Brighton.

Engineering work is taking place between Wimbledon and Sutton, closing lines used by Thameslink overnight from Monday evening until Friday morning. As a result, the 22:54 Luton to Sutton service will terminate at Wimbledon. You can use paper rail tickets at no extra cost on London Underground / London Buses to complete your journey.

Engineering work is taking place overnight in the Redhill area, closing some lines. Between 23:59 on Monday to Thursday evenings until 05:50 Tuesday to Friday mornings, trains will be diverted and unable to call at Redhill. Replacement buses will run between Purley and Three Bridges via Redhill, Horley and Gatwick Airport.

Engineering work is taking place in the early hours between Three Bridges and Brighton, closing some lines. Between approximately 00:25 and 05:05 on Tuesday, Wednesday and Thursday mornings and 01:25 and 05:05 on Friday morning, buses replace trains between Three Bridges and Brighton.

Engineering work is taking place overnight in the Arlesey area, closing some lines. As a result:

• Southbound trains will be unable to call at Arlesey between approximately 23:30 (Sunday / Monday) and 04:40 (Monday / Tuesday)

• Northbound trains will be unable to call at Arlesey between approximately 01:40 and 05:50 (Monday and Tuesday)

Rail replacement buses will run between Biggleswade and Hitchin.

Some late night trains between London Kings Cross / Moorgate and Letchworth Garden City will terminate at Stevenage. You can use your ticket on alternative Great Northern and Thameslink trains between Stevenage and Letchworth Garden City at no extra cost.

Engineering work is taking place between Redhill and Salfords, closing some lines. As a result, all day on Sunday no trains will call at Earlswood (Surrey) or Salfords. You can use your ticket at no extra cost on local Metrobus services between Redhill and Three Bridges.

Engineering work is taking place in the London Bridge area, closing some lines. As a result, the 08:40 (departing 08:37) and 09:10 (departing 09:07) London Bridge to Sutton (London) services will be diverted to start from London Blackfriars, calling additionally at Elephant & Castle, Loughborough Junction and Herne Hill. These trains will not call at London Bridge or Peckham Rye. You can use your tickets at no extra cost on Southern services between London Bridge and Tulse Hill.

Engineering work is taking place between Gillingham (Kent) and Faversham, and all routes through Sittingbourne will be closed. All day on Sunday, Thameslink trains running to / from Rainham (Kent) will instead run to / from Gillingham (Kent). No Thameslink trains will run between Gillingham (Kent) and Rainham (Kent).

Engineering work is taking place in the Arlesey area, closing some lines on Sunday night and Monday morning. As a result:

• Southbound trains (towards London) will be unable to call at Arlesey between approximately 23:30 and 04:00

• Northbound trains (from London) will be unable to call at Arlesey between approximately 01:40 and 05:50
  

Rail replacement buses will run between Biggleswade and Hitchin, calling at Arlesey.

Engineering work is taking place between Gillingham (Kent) and Gravesend, closing some lines overnight. As a result, the 04:06 Gillingham (Kent) to Dartford service will start from Gravesend at 04:18. A rail replacement bus service will run from Gillingham (Kent) to Gravesend to connect with the train, departing Gillingham (Kent) earlier at 03:15.

Engineering work is taking place between Alexandra Palace and Stevenage, closing all lines via Welwyn Garden City overnight from Monday evening until Friday morning.

Between 23:59 and 05:10 each night, buses will replace trains between Alexandra Palace and Stevenage via Welwyn Garden City.

Trains between London and Cambridge / Peterborough / Kings Lynn will be diverted to run non-stop via Hertford North, with extended journey times.

Engineering work is taking place between Haywards Heath and Brighton, closing some lines. Until approximately 05:00 on Tuesday to Thursday mornings, buses will replace trains between Three Bridges and Brighton.

Engineering work is taking place between Nunhead / Beckenham Junction and St Mary Cray / Petts Wood, closing all lines. On Sunday only, buses will replace trains between London Bridge and Swanley, calling at all stations except Nunhead and Ravensbourne.

For Nunhead / Ravensbourne, you can use paper rail tickets at no extra cost on London Buses to complete your journey. A revised train service will run between Swanley and Sevenoaks. Your tickets will be accepted at no extra cost on Southeastern trains between London Victoria and Otford / Beckenham Junction.

Engineering work is taking place between London St Pancras International and London Blackfriars, closing all lines. No trains will run between Finsbury Park / London St Pancras International and London Bridge / Sutton. Trains will run to an amended timetable between:

• London Kings Cross and Peterborough / Royston

• London St Pancras International and Luton / Bedford. No trains will call at Kentish Town

• London Bridge and Brighton / Gatwick Airport / Rainham

• Swanley and Sevenoaks

• Trains between London Bridge and Rainham will be diverted and run on an alternative route between London Bridge and Dartford via Lewisham.

Engineering work is taking place between Three Bridges and Horsham, closing all lines. Buses will replace trains between Three Bridges and Horsham. These buses are provided by Southern.

Engineering work is taking place between Greenwich and Woolwich Arsenal, closing all lines. Trains will be diverted and run on an alternative route between London Bridge and Dartford, and will run via Lewisham. These trains will call additionally at Lewisham, Blackheath, Eltham, Bexleyheath and Barnehurst, and will not call at stations between Deptford and Slade Green via Woolwich Arsenal.

Additionally, a fast non-stop replacement bus service will run between Cambridge North and Royston to provide connections with trains to / from Kings Lynn. An amended train service will run between Kings Lynn and Cambridge, and between Royston and London Kings Cross.

Engineering work is taking place between Gravesend and Gillingham (Kent), closing all lines very early on Tuesday to Friday mornings. Between 00:40 and 04:10 each morning, buses will replace trains between Gravesend and Gillingham (Kent).

Thameslink Rainham route trains will run to an amended timetable between Luton and Rainham on Saturday, and between Kentish Town and Dartford on Sunday. All other Thameslink trains which usually run via London Bridge will be diverted between London Blackfriars and East Croydon, not call at London Bridge, and run to a revised timetable with extended journey times.

Additionally, the 23:11 Horsham to Hitchin service will terminate at Finsbury Park. A rail replacement bus service will run between Finsbury Park and Peterborough. From the start of Sunday service until approximately 08:20, buses will replace trains between Potters Bar / Stevenage and Letchworth Garden City / St Neots / Peterborough.

All Thameslink engineering works are planned and published well in advance, so you'll always have time to adjust your plans. Here's what you might come across and how to deal with it:

• Rail replacement buses. These run in place of trains on affected sections of the route - mostly outside central London, where the Tube doesn't reach. These will pick you up and drop you off at or near the stations, and your train ticket is valid on them at no extra cost. Just allow a bit of extra time, as buses take longer than the train.
• Shortened or truncated services. Some trains will only run part of their normal route. For example, a train that usually goes all the way to Sevenoaks might turn around at Orpington instead. Replacement buses or alternative operators usually cover the rest.
• Split services. During bigger engineering works, the Thameslink line through central London can be split into separate northern and southern sections. You'd travel on one section and then use the Tube or buses to get across the city in the middle. Your ticket covers these alternatives.
• Timetable changes. Even where trains are running, times might be different from the regular schedule. A few services could leave earlier or later than usual, so be sure to double-check your departure time on the day.

Here are a few tips to keep your journey on track:

• Leave yourself extra time, especially if you're heading to Gatwick Airport. A replacement bus or diverted service can add 20–30 minutes to your trip.
• Avoid tight connections through central London during Thameslink engineering works. If you need to cross London, build in a buffer so you're not racing between stations.
• Plan Gatwick journeys carefully. If you're flying and the Brighton main line has engineering works, check your options the day before. Sometimes it's quicker to travel via East Croydon on a Southern service.
• Look at alternative operators. Your Thameslink ticket is often valid onSoutheastern, Southern andGreat Northern trains during engineering works, so check those timetables too.
• Be flexible with your travel date if you can. Disruption tends to be heaviest on Sundays, as this is when there are fewer commuters using the trains. If you can shift your day trip to Saturday or Monday instead, you'll often have a smoother ride.

You'll usually find that most Thameslink engineering work happens in a few hotspots along the network. Here's where to keep an eye on:

• London St Pancras International. As one of the main Thameslink hubs, any work near St Pancras can affect services from Bedford, Luton and Cambridge heading into London.
• The central London line (St Pancras –Blackfriars –London Bridge). This is the tunnel section that links the northern and southern halves of the Thameslink network. When work takes place here, the line gets split into two - trains run on either side but can't go through the middle. Your ticket will be valid on the Underground and London Buses to bridge the gap.
• The East Croydon corridor. East Croydon is one of the busiest stations on the network, and work here can affect trains heading to Brighton, Gatwick Airport and the Sussex coast. If you're flying from Gatwick, always double-check your route when there's engineering work in this area.
• The Bedford route. Services from Bedford, Luton and St Albans into London can be affected by overnight or early-morning work north of the city. This usually means buses replacing trains for the first or last few services of the day.
• The Brighton main line. Work between Three Bridges and Brighton can occasionally pop up on bank holiday weekends. Replacement buses run between the two stations, and your ticket is valid on them.

Are Thameslink tickets valid on replacement buses?

Yes, your Thameslink ticket is valid on all rail replacement buses at no extra cost. In many cases, your ticket will also be accepted on other train operators like Southeastern and Southern, plus on London Buses, the Underground and Trams, where specified for reasonable alternative routes.

What happens if I miss a flight due to engineering works?

How far in advance are engineering works announced?

Most planned engineering works are confirmed around 12 weeks in advance. It's a good idea to check a few days before you travel, as details can occasionally be updated closer to the date. You'll always see the latest timetables on Trip.com.

Do central London closures happen often?

They tend to crop up a few times a year, mostly over bank holiday weekends when fewer commuters are using the line. When the St Pancras to London Bridge tunnel closes, Thameslink runs amended services on either side, and your ticket covers the Tube and buses through central London.

Are late-night trains affected more frequently?

Yes, often a lot of engineering work takes place overnight, so the last few services of the day are more likely to see changes - things like trains ending their journey a stop or two early, or buses replacing the final departures. If you're travelling late, check the timetable for that specific evening to make sure you can get home with minimal disruption.