The 125 Group has the current
HST▸ FGW▸ diagrams
here.I think 81F probably meant he was interested in similar info for the 165/166 fleet...
But I think he'll probably find that given the Oxford Bristol service stopped in about 2003 it's unlikely the units have sat around spare since then.
Didn't the ex-Bicester unit just increase the thoughput of the current Turbo overhaul scheme?
Paul