Engineers have worked through the night to restore rail services to one of London's busiest transport terminals after a fire caused nationwide disruption.
Trains were cancelled going in and out of Euston station from Wednesday afternoon after a blaze next to the track near South Hampstead triggered a power cut.
Despite work to restore services, London Overground services were still being affected on Thursday morning.
There will be no service on the line between the station and Harrow & Wealdstone until 1pm, Network Rail said.
It had tweeted in the night to say: "A normal service is expected to and from London £Euston today following major disruption caused by a power cut at the station."
The blaze had affected customers on services including Midland, Virgin and Southern, connecting the hub with large areas of the country.
A blaze next to the track near South Hampstead triggered a power cut.
National Rail said a limited number of services were able to leave the station, which serves around 114,000 passengers each day, for a time but it was closed again because of poor lighting.
In a statement, Network Rail said it was hoping to get services back to normal by Thursday morning, with engineers working through the night.
It added: "An electrical fire at South Hampstead has stopped trains running in or out of London Euston.
"Train customers are impacted in London and the length of the West Coast Main Line, including Birmingham, Manchester and Liverpool.
No service between Harrow & Wealdstone and Euston due to power supply problems. Good service on other routes.— London Overground (@LDNOverground) April 20, 2017
"Engineers are preparing to work through the night to install 100 metres of 11,000-volt power cables with the aim of getting services back to normal on Thursday morning."
Euston station shut no trains running North, overheads down. Well done BTP Euston assisting with crowds of disgruntled passengers.— BTPolFed (@BTPolFed) April 19, 2017
The fire also took out a stretch of the London Overground line between Euston and Harrow & Wealdstone.
A Virgin Trains spokesman said: "Tickets will be accepted for travel or a full refund offered. Alternative routes are available but customers are urged to check their journey before travelling."
Network Rail said the disruption was also affecting nearby terminals, such as Clapham Junction to the south west, and Milton Keynes Central in the north west.
Affected customers can find the latest travel information, including alternative routes, at nationalrail.co.uk and from their train operators.
According to the Office of Rail and Road, the independent regulator, Euston is the fifth busiest station in Britain with 41.7 million entries and exits in 2015/16.