Due to emergency engineering work being carried out on the Overhead Electrical Lines that provide power to the trains, on the morning of Sunday 3rd December, services will be unable to use Liverpool Street station before 05:30. The following service alterations will be in effect:
- 03:40 Liverpool Street to Broxbourne will start at Tottenham Hale at 03:52
- 04:10 Liverpool Street to Broxbourne will start at Tottenham Hale at 04:22
- 04:40 Liverpool Street to Broxbourne will start at Tottenham Hale at 04:52
- 05:10 Liverpool Street to Broxbourne will start at Tottenham Hale at 05:24
- 05:40 Liverpool Street to Broxbourne will start at Tottenham Hale at 05:54
Customers are advised to travel on the London Underground Victoria Line to Tottenham Hale, which operates through the night.