[2] Barclay's sister, Mary Jane (1870–1939), married John Hope Simpson who was Liberal MP for Taunton from 1922 to 1924.

[4] He succeeded his father in the family firm, Robert Barclay & Co in Manchester[5] but he also had other extensive business interests.

[12] In 1929 Barclay purchased land known as the Ings and Stable Hills on the shore of Derwent Water in the Lake District and presented them to the National Trust.

In a straight fight in the Manchester Exchange constituency he defeated the sitting Conservative MP, Sir Edwin Stockton by a majority of 1,799 votes.

[22] Barclay tried to win back Manchester Exchange at the 1929 general election but in a three-cornered contest he again came in second behind the Conservative, with Labour third.

[24] Lady Barclay survived until 27 October 1960 when she died at the family home, Far Hills, Alderley Edge, Cheshire.