Withdrawn train means delays on the Metro between Sunderland and South Shields

There are delays on the Metro between South Tyneside and Sunderland.
A Metro train has been withdrawn from serviceA Metro train has been withdrawn from service
A Metro train has been withdrawn from service

The service has Tweeted that there is a gap in service between South Hylton and Brockley Whins in either direction.

The delays have been caused by a train being withdrawn from service.