The seat had become vacant when the constituency's National Liberal Member of Parliament (MP), Sir James Blindell (1884 – 10 May 1937) died.
He was first elected as the constituency's MP at the 1929 Holland with Boston by-election, caused by the death of the Conservative MP Arthur Dean. Blindell overturned a Conservative majority of nearly 5,000 to win with a majority of 3,706. His victory was the last Liberal by-election gain until Torrington in 1958.
He was re-elected as a National Liberal at the 1931 general election and at the 1935 general election. In both elections, the Conservatives (who also supported the National Government) did not field a candidate against him, and he was returned with large majorities.
Candidates
Two candidates were nominated. The list below is set out in descending order of the number of votes received at the by-election.
1. The National Liberal Party candidate, supporting the National government, was Herbert Walter Butcher (12 June 1901 - 11 May 1966). After winning the by-election[1] he retained the seat until he retired in 1966, shortly before he died.
2. Representing the Labour Party was E.E. Reynolds. He had previously contested Holland with Boston in the 1935 general election.
Result and votes
The National Liberal Party held the seat with a reduced majority.