For all those wondering about the new enviro's for Stockton, they've tweeted this:
Stagecoach NEast @StagecoachNE 2h2 hours ago
Tees Ops - Check out our brand new additions to the fleet in Teesside, First one ready for service on 52 & 35 today
RE: Stagecoach North East: Latest News & Discussion - September 2015
Ooo Friend, Bus Friend.