Walrus, did you mean to write A, B, C for option 2? My instructions say A, C, D.
Option 1; UF.Y B0712 601 sqn Duxford Aug 1941
A = bronze green rev65
B = greyish blue rev79
D = grey rev57
Option2; AE.W BE485 402 sqn Warmwell Nov 1941
A = bronze green rev65
C = 80% rev79 + 10% rev48 (sea green) + 10% rev 57
D = grey rev57
A must be Dark Green
D must be Medium Sea Grey
Either B or C will be Ocean Grey. I suspect Graham could be right that the other is Mixed Grey, but which is which?