A broken-down train between Watford Junction and London Euston is set to cause hours of delays.

The train fault, at Harrow & Wealdstone, means that some of the lines are blocked between the stations and there will be a reduced service on the London Overground.

It was reported at 11.21am today (October 17) and was expected to cause delays for just under an hour, however disruption is now estimated to continue until 1.15pm.

Update: The time to clear has been pushed back to 3pm

Tickets can be used on local buses via any reasonable route, according to National Rail, and travellers have been advised to keep their tickets as they may be entitled to compensation.

The 11.45pm trains to London Euston and St Albans Abbey were cancelled and the 12pm, 12.15pm, 12.30pm, 12.45pm, and 1pm trains to London Euston are also confirmed to be cancelled.

It comes after the line was delayed due to a fault yesterday afternoon (October 16).