The story is in chapter X of
Enemy Coast Ahead by Guy Gibson VC DSO DFC:
But despite the small trouble we had, other squadrons had begun to look upon it as a suicide ship. There is a story that one particular squadron in the north had got to the stage when they almost refused to fly it. They said that it stalled too quickly and that it was unmanageable in tight turns. They were sitting about one foggy day on their aerodrome when there was no flying possible, and were discussing the subject heatedly, when suddenly a Beau whistled over their heads at about 100ft, pulled up into a stall turn, dropped its wheels and flaps and pulled off a perfect landing on the runway. Naturally, this attracted a lot of attention. They all thought that this pilot must have been one of the crack test pilots who had come up to show them how. As it taxied up to the watch office, they all crowded around to get the gen. However, a lot of faces dropped to the ground when from underneath the Beau crawled a figure in a white flying-suit, capped by blonde, floating hair; it was one of the ATA girls. I am told that this squadron had no trouble from Beaus from that day on.