Haven't got it to hand, but I'm sure in 'Enemy Coast Ahead', Guy Gibson was taken on his first flight in a Lanc, by Hoppy Hopgood.
I think he demonstrated it with one engine operative, 'losing height, but enough to get you away from the enemy coast'.
Later, he took the Secretary of State for Air ( IIRC) and demonstrated the Lanc on two engines and then the flight engineer, rather than unfeathering them, feathered /shut down the two live engines!