Engineering work is taking place between Bowes Park and Stevenage, closing all lines.
Buses will replace trains between Alexandra Palace and Stevenage via Hertford North.
Some trains that normally run between London Kings Cross and Cambridge / Letchworth Garden City will be retimed slightly.
Check before you travel:
You can plan your journey using the National Rail Enquiries Journey Planner
Replacement Bus Travel Advice:
You can find the location of your bus replacement by checking station signs or by searching for your station on our station information pages.
Bicycles are not allowed on rail replacement bus services at any time, unless fully folded. More travel advice for your replacement bus journey is available by selecting the Train Operating Company you are travelling with here.