 The constituency was formed largely from the District of Bracknell (formerly the Rural District of Easthampstead), which was previously part of the County Constituency of Wokingham.It also included the parts of the Royal Borough of Windsor and Maidenhead which had formerly comprised the Rural District of Windsor (previously part the County Constituency of Windsor and Maidenhead) and the parishes in the former Rural District of Eton in Buckinghamshire which had been transferred to Berkshire by the Local Government Act 1972 (previously part of the County Constituency of Beaconsfield).Its main settlement was Bracknell, and it also included Ascot, Sunningdale, Sunninghill, Datchet, Crowthorne, Sandhurst, and Old Windsor.