One of London’s busiest rail stations was evacuated after a power cut caused by a track side fire - leaving trains in chaos for the rest of the day.
The small fire broke out on a section of track near South Hampstead station, leading to all services in and out of Euston station being cancelled.
The afternoon blaze caused damage to signalling equipment and led to a power cut,causing massive disruption to travellers during the evening rush hour.
Victoria and Northern line Tube services were also hit.
Network Rail warned services may not get back to normal before the end of the day.
Alongside trains in London services all along the West Coast line, including trains serving Birmingham, Manchester and Liverpool, were affected.
Some travellers on London Midland and Virgin Trains services south of Birmingham were being advised to avoid using the trains at all on Wednesday where possible.
Photos from the scene of the fire showed flames and smoke rising from a piece of cabling beside the line.
Power failure at Euston, fire alarms gone off. everyone evacuated. pic.twitter.com/WY4jqXdbq9— Geoff Marshall (@geofftech) April 19, 2017
London Midland, Overground and Virgin Trains services have all been affected by the disruption.
A spokesman for Network Rail said: “No trains are running in or out of London Euston due to a line side fire near South Hampstead which has damaged signalling equipment.
Euston station is closed because of a power cut. Looks like I may be on a late train! pic.twitter.com/6UBmUiQUvU— davemoutrey (@davemoutrey) April 19, 2017
“As a result of the fire the power supply to Euston station was temporarily cut.
“This led to the evacuation of the station.”
They said later: "Network Rail engineers are trying to get some trains moving this evening on the West Coast main line by using emergency generators to restore power to signals - the traffic lights of the railway.
"Engineers are preparing to work through the night to install 100 metres of of 11,000-volt power cables with the aim of getting services back to normal tomorrow morning."
London Overground services are suspended between Harrow & Wealdstone and Euston.
Customers are advised to use Chiltern Railways, London Midland, London Buses, London Underground, Thameslink and Southern.
London Midland customers were being advised to postpone their journeys until Thursday if possible.
Tickets can be used on East Midlands Trains between London and Wellingborough, Great Western Railway between Worcester and London, Chiltern Railways between London and Birmingham, Cross Country between Birmingham, Reading, Leicester and Derby, or Thameslink between London and Bedford.
Virgin Trains customers may use Chiltern Railways between London Marylebone and Birmingham Moor Street and also East Midlands Trains and Virgin Trains East Coast on reasonable routes.
National 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.