Engineering work is taking place between Radlett and Harpenden, closing some lines.
On Saturday, the 22:05 Bedford to Gatwick Airport train will depart four minutes earlier at 22:01.
From 22:00 Saturday, and all day on Sunday
Northbound trains towards St Albans / Luton / Bedford will experience slightly longer journey times.
Services to / from Sutton via Mitcham Junction will start from Luton (Southbound) and terminate at London Blackfriars (Northbound).
Services to / from Sutton via Wimbledon will start from London Blackfriars (Southbound) and terminate at Luton (Northbound).
Between 00:45 and 08:50 on Sunday
Trains will be subject to longer journey times between Radlett and Harpenden.
A reduced service will run between Bedford and London St Pancras International.
Check before you travel:
You can plan your journey using the National Rail Enquiries Journey Planner
Although journey planners are showing correctly, your journey may be subject to alteration at short notice due to the Coronavirus pandemic. Please check before your journey.
Replacement Bus Travel Advice:
For helpful advice if you need to travel on a rail replacement service, including accessibility and bicycle information, please use this page.
You can find the location of your bus replacement by checking station signs or by searching for your station on our station information pages.