No train services will be in place to or from London Euston station on Sunday (December 3) until at least midday.
More than 500 metres of overhead wires have been damaged in the Wembley area and engineers are now working to replace them.
The Wembley dewirement has led to "major disruption" from London Euston as all services have been cancelled while engineers are on site.
Passengers are being advised to check before they travel on Sunday (December 3).
We will be bringing you all the latest updates on our live blog.
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Train services have resumed at London Euston following the earlier disruption.
Some journeys may have some delays after the earlier engineering work in Wembley.
To read more on the incident, check out this article.
London Euston to Northampton
Particularly good news for those travelling to Northampton from London Euston this afternoon.
Some services resume
Looks like there’s some good news for those travelling to or from London Euston today.
Some services are back up and running, although passengers may still face 30-minute delays.
Others remain cancelled but we’ll bring you the latest on that as we get it.
Cancellations still in place
The chaos continues at London Euston
Alternative train services are overcrowded following the London Euston disruptions this morning.
One Twitter user said: “No trains out of London Euston, cheers!
“No information and stuck on a train to Birmingham standing for 2 hours because of no extra carriages! Merry Xmas!”
Network Rail tweet
'Customers advised not to travel'
A message on the National Rail Enquiries site said “customers are advised not to travel”.
“No London Midland and Virgin Trains services will be able to depart or arrive at LondonEuston until at least 12pm.
Tickets valid for travel Sunday 3 December will be accepted on Monday.
“If you must travel, please check the Journey Planner to make sure the line has reopened before starting your journey.
“Trains that do run are expected to be busier than normal, so travel should be considered for later in the day or on Monday where possible.”
Trains operated by Virgin, London Midlands and London Overground will be affected and delays are expected throughout the day.
Virgin Trains customers can use Chiltern Railways, TransPennine Express and Virgin Trains East Coast via any reasonable route until further notice.
Engineers working on 'significant job'
A spokesman for Network Rail said engineers are working as quickly as possible to complete the “significant job”.
There will be no train services to or from London Euston station tomorrow morning (Sunday 3 Dec) until at least midday.
Passengers are being advised to check before they travel tomorrow using National Rail Enquiries.
At around 15:30 Friday afternoon (1 Dec) the overhead wires that provide electrical power to trains were damaged in the Wembley area.
Over 500m of overhead wires now need replacing and our engineers have been on site since the incident occurred, working to repair the damage as quickly as possible.
To complete this significant job, all lines out of London Euston will have to be closed Sunday morning.
Passengers traveling on the West Coast main line in and out of Euston will be affected by delays as the timetable is amended.
Wires on the tracks
A photo released by Network Rail shows a large number of wires on the tracks in Wembley.
More than 500 metres of overhead wires now need replacing and the cause of the incident is currently unknown.
London Euston disruptions
Good morning! We’ll be bringing you live updates on Sunday (December 3) about the “major disruptions” at London Euston.
A 500-metre dewirement in Wembley on Friday (December 1) has led to no services being run to or from Euston until around midday.
Engineers are currently on site working to replace the overhead wires which provide electrical power to trains.
Passengers travelling into London have been advised to check before they travel today.