1885–1918: The Municipal Borough of Tiverton, and the Sessional Divisions of Cullompton and Wonford.

1983–1997: The District of Mid Devon wards of Boniface, Bradninch, Cadbury, Canal, Canonsleigh, Castle, Clare, Cullompton Outer, Cullompton Town, Culm, East Creedy, Halberton, Lawrence, Lowman, Newbrooke, Paullet, Sandford, Shuttern, Silverton, Upper Culm, Upper Yeo, Westexe North, Westexe South, Willand, and Yeo, and the District of East Devon wards of Broadclyst, Clystbeare, Clyst Valley, Exe Valley, Ottery St Mary Rural, Ottery St Mary Town, and Tale Vale.

Palmerston was appointed Secretary of State for Foreign Affairs, requiring a by-election.

Temple was appointed Constable of Dover Castle and Lord Warden of the Cinque Ports, requiring a by-election.

The political parties had been making preparations for an election to take place from 1939 and by the end of this year, the following candidates had been selected;