No that's not his marriage. According to a newspaper cutting collection on Ancestry
Sgt Pilot John Edward Brown
Parents H R W & Mrs Brown, Sunningdale
Diane Mary Bridger Philby
Parents H St. J B Philby CIE and Mrs Philby of 18 Acol Rd, London
Marriage 13 Sep 1940 Umtali S Rhodesia
Birth announcements
4 Feb 1942 Salisbury, S Rhodesia a daughter
22 June 1944 Salisbury, S Rhodesia a son (JEB now Flying Officer)
23 May 1948 Oslo, a daughter (named, but I won't put in here) (JEB now Squadron Leader and has a DFC)