Railway General Knowledge.

[DerekC]

Something like the class 310 from the WCML clue?

Good guess but not fast enough - they wanted a 100mph unit

Class 321

Not ready for the scrapyard in 2001

Class 323s?

Definitely not ready for the scrapyard

Class 309?

100mph and slam door - just the job! 309616 and 309624 were reclassified to Class 960 and ended their days at Old Dalby.

@D6130 - your empty test track to find a use for - and that's another story too!