Information From Steven Knight Media - Fleet News Ramblings:

Stagecoach North East...
Enviro 400s 19194-98 and 19200 are being transferred from Walkergate to Slatyford, whilst MAN/ALX300 is being prepared for service at Stockton. Volvo Olympians 16834/36 have been sold to Ensign. MAN/East Lancs Kinetic 22515 is reported by the company as being prepared for service at Slatyford.
The cascade plan for Enviro 400s displaced by the arrival of new Enviro 400MMCs here is:
19141/43/44/45/46/47/48 to Stagecoach Cumbrian & North Lancashire
19149 to Stagecoach Yorkshire
19150-55/57 to Stagecoach East Scotland
19158-63/93 to Stagecoach South