After coming out as a
debutante in 1937, Campbell-Preston sailed to Canada the following year to become an informal lady-in-waiting to the
viceregal consort,
Lady Tweedsmuir. During the Second World War, she served with the
Women's Royal Naval Service. She was a member of
Argyll County Council from 1960 to 1964 before being asked in 1965 by the
Queen Mother's private secretary,
Sir Martin Gilliat, who had been imprisoned with her husband at Colditz, to become a
lady-in-waiting to the Queen Mother. She continued in that role, attending events nationally and abroad, until the Queen Mother's death in 2002. Campbell-Preston was described as a stalwart of the staff who was not hesitant to ask the Queen Mother difficult questions when other members were reluctant. Campbell-Preston
turned 100 on 2 September 2018, and died on 22 November 2022 at age 104. ==Honours==