Night After Night by Max Lambert says the following.
Flight Sergeant Marshall, the mid upper gunner, lost both his legs above the knee when his Stirling crashed on 15th Sept 1942.
On 6th Jan 1945 he walked down the aisle on artificial limbs, to be married in St. Ethelreda's church, Ely.
His best man was fellow New Zealander Squadron Leader Arthur Colville, who had been badly injured when his Wellington crashed during an air test in Feb 1942.
Colville survived by the slimmest margin..... feet almost wrenched off, 14 breaks in one leg, 4 in the other, back broken in 2 places, skull fractured, and severe facial injuries.
He and Marshall became firm friends in Ely hospital.