London Overground services from Euston are not expected to fully resume until this afternoon following a fire which closed the station.
National Rail said that while other services were starting to return to normal this morning, Overground trains between the station and Harrow & Wealdstone, in northwest London, would not be running until 1pm.
All trains going in and out of Euston were cancelled on Wednesday afternoon after a cable fire next to the track near South Hampstead caused a power cut.
The disruption affected commuters hoping to travel on Midland, Virgin and Southern services to destinations including Birmingham, Manchester and Liverpool.
According to National Rail, a few services were able to leave the station – the UK’s fifth busiest – before it was closed again due to poor lighting.
In a statement, it said engineers worked through to night to restore power but that further work still needs to be carried out.
It said: “Train services are returning to normal on the West Coast main line today after Network Rail engineers restored power overnight to London Euston and its signals – the railway’s traffic lights – following a cable fire at South Hampstead yesterday.
“While our engineers have restored power to Euston, they have yet to replace the 100-metre stretch of fire-destroyed, 11,000-volt cable at South Hampstead. They will do this job overnight tonight.”
Passengers are advised to check for the latest information before they travel.