My grandfather and his brother both joined Bomber Command. My grandfather survived the war flying Lancs, primarily with 44 (Rhodesia) Sqn. His brother was sadly killed during training and is in a Commonwealth War Grave near Bournemouth.
So in our family it was a 50% survival rate, I'm sure other families were less fortunate.
I'm sure the sight and sound of these Spits would be incredible and I hope they find them!