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Buses replace late night / early morning trains between Potters Bar / Hertford North and Welwyn Garden City and Letchworth Garden City / Peterborough on Saturday 28 and Sunday 29 March 

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Engineering work details

Starts Saturday 28 March 2026 to Sunday 29 March 2026

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Train operators affected

Route(s) affected

Great Northern between London Kings Cross and Letchworth Garden City / Cambridge, and between Moorgate and Letchworth Garden City

Thameslink between Horsham and Peterborough

Description

Engineering work is taking place overnight between Potters Bar and Peterborough / Letchworth Garden City, closing some lines.

At the end of Saturday service, buses replace trains between Potters Bar / Hertford North and Welwyn Garden City / Peterborough / Letchworth Garden City.

From the start of Sunday service until approximately 08:30, buses replace trains between Potters Bar and Welwyn Garden City / Letchworth Garden City / St Neots, and between Hertford North and Stevenage.

Additionally, until approximately 08:15, no trains will run between London Kings Cross and Finsbury Park.

Paper rail tickets will be accepted at no extra cost on London Buses / Underground between London Kings Cross and Finsbury Park / Alexandra Palace.

Check before you travel:

You can plan your journey using the National Rail Enquiries Journey Planner

You can plan your journey on London Buses / Underground by using the Transport for London Journey Planner

Replacement bus travel advice:

For helpful advice if you need to travel on a rail replacement service, including accessibility and bicycle information, please use our Rail Replacement Services page.

You can find the pick-up and set-down location of rail replacement services by checking station signage or by searching for your station on our Find a Station page.

Please be advised that replacement vehicles may be busier than usual, and you should allow extra time for your journey.

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