[1] The constituency returned one Member of Parliament (MP) to the House of Commons of the United Kingdom, elected by the first past the post voting system.
The by-election was held due to the death of the incumbent Liberal MP, Alexander William Black on 29 December 1906.
He died from injuries received in the Elliot Junction rail accident,[2] forcing a by-election early in 1907.
[3] Black had been Liberal MP for the seat of Banffshire since the 1900 General Election.
Waring was re-elected at the following general election against a new Conservative opponent; Whitelaw did not stand for parliament again.