Assuming my eyesight isn't deceiving me it's one of the 6-compartment Brake Second's on a short underframe (Diag 371) ... If that's right enough, you are kind of restricted to one of only 12 allocated to the Western Region (the rest were on long underframes) from Lot 30045 i.e. W43100 - W43111 - Lettering was "Golden Yellow" - well really it was straw coloured - Do you not fancy it in BR Maroon so late in the day c/w lining! Nice shot of a long underframe version here;
c.1959 - Honeybourne Junction, Worcestershire.
Actually Bob it was me that steered Richard in the direction of BR Coach Red livery [also known as the Blood from the Blood & Custard livery] as I think they looked so much better in this than in lined BR Coach Maroon, but that is just a personal opinion. IMHO the NG stock looks somehow 'over-cooked' in lined livery. I'm ducking out of this one no though, as we'd better let the builder decide for himself!
DJP/MMP