Metro delays after train is withdrawn

There are delays across the Metro system this morning.
There are delays on the Metro this morningThere are delays on the Metro this morning
There are delays on the Metro this morning

Metro has Tweeted that it is operating a frequent service but not to timetable .

The service says the delays are due to low rail adhesion and an earlier failed train.

Travellers are being advised to allow extra time for their journey.