Possible leads

I plugged in some of the provided information in the advance search function at http://www.abebooks.com. Here are a couple of possible leads (I haven’t read them myself):

Conquest Before Autumn by Matthew Eden (Abelard-Schuman, 1973)

A Piece of Resistance: The Russian Invasion of Britain by Clive Egleton (New English Library, 1972)

Good luck!