Here is the email i was on about earlier from Stagecoach:

Good morning Michael,

Thank you for your email.

The vehicles require specialist equipment to be installed at the depot to allow efficient fuelling and this will commence in early 2014.

Once this is completed the vehicles will subsequently enter service.

The first vehicles are scheduled to be deployed on services 16 and 20, with the remainder arriving later in the year to be deployed on services 3 and 13.

Thank you for contacting Stagecoach North East,

Regards