Entitlement to Soviet Wartime Medals

[Luath]

I wonder if someone could help with the following facts:-

A citizen born in Czarist Russia in 1915 is forced by persecution / discrimination with his family to move to Europe in 1930's. With the rise of fascism he joins the Foreign Legion with a view to joining the Allies in the war against Nazism. He joins the British Army in 1943 and serves for 3 years and is awarded 3 British Medals (French/Germany Star; 1939/45 Star and War Medal). Serves in a prestigious regiment with undoubted bravery. Marries a British woman - has a son of joint UK/Russian nationality. Goes back to Russia in 1956 and dies in the Ukraine in 1977. His widow returns to the UK but son remains in the Ukraine. Never renounces Russian citizenship. Feted when he returns to the USSR in 1956.

Is there any precedent for such a person to be awarded (even posthumously) Soviet Wartime medals and, if so, which ones and who does one contact if this is possible?

Many thanks in anticipation.

Luath