The Centros have arrived from Yorkshire and they are

1535 (YJ58 FFB)
YJ58 FFO
YJ58 FFP

The later two will be 1536/7 but which way round is as yet unknown

Two are currently parked outside in Stockton depot yard in the dead corner while the third is inside being worked on. Note of caution - don’t expect to see them on the road anytime soon.....