They have driver swaps at Sunderland and I've witnessed so many occasions where the driver hasn't turned up...
The driver of the 230 was once having a discussion with an Arriva driver and he said, "Well why don't you just radio in to control to see where the driver is?" - the driver responded, "The radio system doesn't work like that with us..."

Come on, how are the drivers meant to get in touch with control? Get out of their cab and use their mobile?!

EDIT: Actually, saying that... I've been on a Stagecoach in Sunderland bus in the past and that has happened. :L