Gap in service on Metro due to 'lack of available trains'

There is a gap in service on the Metro system this morning due to a "lack of available trains".
A Metro train.A Metro train.
A Metro train.

The service said it is affecting trains between South Hylton in Sunderland and Newcastle Airport.

Bosses have apologised for the disruption.

The service tweeted: "There is a gap in service to trains between South Hylton and the Airport due to lack of available trains.

"Sorry for any inconvenience caused.

"Please leave extra time for your journey."