Mossie Bomber Colours

Best reading on this is

Scale Aircraft Modelling Combat Colours No 5 – Mosquito in RAF PR and Bomber Service 1941 – 1945 by Paul Lucas

It seems that some early BIVs were finished in DE/DG/Sky prior to the decision to adopt the Fighter Command DG/OG/MSG scheme whilst there is some speculation that a number of those with DE/DG uppersurfaces were finished in Azure Blue rather than Sky undersurfaces

make of that what you will!