(23 Aug 2015, 2:31 pm)NK53 TKT wrote I think 4512 and 4514 need to go
They need to currently, yes, however if Arriva can't get vehicles to replace them, looking at the Cadets being modified at Stockton, they also may be modified to be DDA compliant. If so, they'll be going for years, along with the ALX300 B10BLE's.
(When I say they need to currently, I mean no matter what condition, because of DDA)