sentences:  Kerr was elected as Unionist MP for the Combined Scottish Universities at a by-election in 1935 after the MP and novelist John Buchan resigned his seat when he was appointed as Governor General of Canada.After his election to Parliament, Kerr resigned his professorship, and moved to Hertfordshire.He held the seat until the university constituencies were abolished for the 1950 general election, serving for a time as Chairman of the Parliamentary and Scientific Committee.