The Metropolitan service has issued an apology, giving the following explanation:
“Unfortunately we’ve got a couple of big issues going on:-
We do have some train operator resourcing issues, we’ve had higher than expected attrition however we do have new train operators coming in so this should resolve soon.
We are also having to train all our operators on the next section of the 4LM signalling upgrade (SMA9) so this is not helping with our availability. We’ve reviewed the training programme to lessen the burden on coverage. Next week there will be less courses running and so should help with our duty coverage.
In addition there are some issues with the track condition so there are currently speed restrictions in the Wembley area. The whole area will be rerailed over the coming weeks which will mean the speed restriction can be lifted.”
Transport for London
20th July 2026