The Mid designation was lesser used, since it could be misleading, as its extent until 1885 was a long strip to the east bounded by among other parishes: Lambeth, Streatham, Croydon, Burstow, Capel and Sutton.

The Act of 1885 set up the seat so as to comprise:[1] Thus the seat drew on Mid Surrey as to Tolworth, New Malden, Malden, Worcester Park, Surbiton, Hook, Coombe and Long Ditton in the Kingston Hundred and Sessional Division.

It drew on West Surrey as to: Ashtead; Banstead; Great Bookham; Little Bookham; Cheam; Chessington; Cuddington; Epsom; Ewell; Fetcham; Headley; Leatherhead; Sutton; Walton on the Hill; Cobham; Thames Ditton; Esher; East Molesey; West Molesey; Stoke D'Abernon; and Walton on Thames.

[2][3][4] The Representation of the People Act 1918 cut the area down to its south-eastern third namely:[5] The Representation of the People Act 1948 confirmed a 1945-implemented split-up of all seats of more than 100,000 electors, of Sutton and Cheam Urban District to create Sutton and Cheam (UK Parliament constituency) to the north-east.

[7] The 1983 reforms saw more than its renaming and technical abolition, the seat shed in the south the former Leatherhead Urban District to Mole Valley created that year.