1936 Greenock by-election
The seat had become vacant on 13 October 1936 when the Secretary of State for Scotland, Sir Godfrey Collins died at the age of 61.A National Liberal Member of Parliament (MP), he held the seat since the January 1910 general election.The National Liberal candidate was V. E. Cornelius, who had not previously contested a parliamentary election.Gibson had unsuccessfully contested one by-election and three general elections most recently at Dundee in 1935.On a high turnout, the result was a victory for Gibson, who won the seat with a swing of nearly 8%.