The West Coast main line has been hit by problems on the first working day of its new timetable, following a £13bn modernisation of the entire line.
The West Coast main line has suffered slight delays on the first working day of its new timetable, following a £9bn modernisation of the entire line.
Network Rail said a fuse had blown in a track circuit in Willesden in north-west London.
Network Rail said a fuse had blown in a track circuit in Willesden in north-west London, but was soon fixed.
Trains between London and Liverpool were among those delayed.
Network Rail says 89% of trains across the whole network are currently running on time, with those delayed averaging 10-15 minutes late.
Network Rail says 89% of trains on the route between Euston and Glasgow are currently running on time, with those delayed averaging 10-15 minutes late.
A spokeswoman described the problem at Willesden as a "glitch".
It said the problem occurred at 0730 GMT, and that engineers should fix it in "minutes".
She said the failure occurred at 0730 GMT, and that engineers had fixed it by about 0840 GMT.
Two of the four tracks through that section of the West Coast line are closed as a result.
Two of the four tracks through that section of the West Coast line were closed as a result.
Network Rail has said services will be improved and journey times cut by up to 30% following the upgrade work.
Network Rail has said services will be improved and journey times cut by up to 30% following the upgrade work.
Meanwhile, passengers travelling with three other rail companies - Chiltern, Wrexham & Shropshire and CrossCountry - were delayed up to one hour because of overrunning engineering work between Leamington Spa and Banbury.
And a broken-down train in the Manchester area affected rush-hour services on Northern Rail and First Transpennine Express.
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