Southeastern Yellow Stripe livery Class 466 DTOSL, units should be formed like thus: DTSOL + DMOS.
GEC Alsthom built the Class 466 between 1993 and 1994 to replace the elderly Class 415s and Clas 416s.
They are a two car variant of the Class 465 to operate on branchlines and secondary routes in Kent and South London and also to strengthen the Class 465s to six car units during peak hour.
They continue to operate sterling service in London and Kent workings to this present day.
My thanks goes to Nexusdj for allowing me to use some of his textures and providing help and support, I'm also grateful to the the users of the British Trainz Forum.