Sisters who were WW2 codebreakers kept war efforts secret from each other for 30 years

mirror.co.uk:

Sailing home to Blighty from the Far East in 1945, Colonel Cary Owtram could not wait to see his family. Thinking about wife Bunty, son Bobby and daughters, Pat and Jean, had helped him endure three brutal years in a Japanese PoW camp.

He would picture them in the grounds of their home, playing tennis, rowing on the lake or pruning rhododendrons. So he found it most peculiar when a nurse on the troopship insisted she had met his youngest daughter in Italy a few months earlier.

Ensign Jean Owtram, who had fallen off a cliff and almost drowned? “Daddy told the nurse she must be mistaken,” recalls Jean 75 years on. “Why on earth would I have been in Italy?