Lambert younger stood successfully as a National Liberal candidate in his father's seat, South Molton.

In 1950 the constituency was abolished and replaced by Torrington, which Lambert continued to serve until his father's death in 1958, at which point he joined the House of Lords.

Quinn who was Anglo-Irish, came over from her family home Greylands in Dalkey just south of Dublin to be educated in England where she was educated at the Sacred Heart Convent in Roehampton where she shared a room with Vivien Leigh and they became lifelong friends; she was a bridesmaid at her first wedding.

Lambert and his wife had a son, George, educated at Harrow, who served in the Royal Horseguards (Blues) retiring as a Captain, who died in 1970 in a car accident at the age of 29, and a daughter Louise, who married Sir Peter Gibbings in 1975, Chairman of the Guardian Newspaper 1973-1988 and the Radio Authority.

Lady Gibbings works in the voluntary sector supporting mentoring and prison visiting programmes.