When Len Deighton made the comment in his book FIGHTER a furious Sdn Ldr Cardew said that he would sue Deighton unless he produced chapter an verse about the incident. He didn't get a reply. But then Deighton did show a propensity for a little romancing! No doubt there were frightened men in the shelters, and wouldn't you be if you being strafed by Me109s and bombing at low level, Dornier 17s and Ju88 the same - and some of it went on for hours - best place was the shelters.
I personally spoke to Bee Beamont in 2003 about this, knowing that he commanded 609 Sdn. His reply was that it was 'utter tosh.' No incident of that nature ever appeared in the official archives of the time. Nuff said.