[n 2] The seat was abolished for the 2024 general election and largely replaced by the new constituencies Buckingham and Bletchley and Mid Buckinghamshire, with some areas transferred to Aylesbury.

Before the periodic review effected in 1983, the new town of Milton Keynes, including its older parts such as Bletchley and Fenny Stratford,[n 3] was in the constituency.

Nonetheless, UKIP's leader, Nigel Farage, stood against Bercow in the 2010 election but finished third behind the Buckinghamshire Campaign for Democracy founder, who previously founded the Pro-Euro Conservative Party.

The District of Aylesbury Vale wards of Aston Clinton, Bierton, Brill, Buckingham North, Buckingham South, Cheddington, Eddlesborough, Great Brickhill, Great Horwood, Grendon Underwood, Haddenham, Hogshaw, Long Crendon, Luffield Abbey, Marsh Gibbon, Newton Longville, Oakley, Pitstone, Quainton, Steeple Claydon, Stewkley, Stone, Tingewick, Waddesdon, Wing, Wingrave, and Winslow.

The District of Wycombe wards, including Princes Risborough, were transferred from Aylesbury, offset by the return of Aston Clinton.

In April 2020, the Districts of Aylesbury Vale and Wycombe, as well as those of South Bucks and Chiltern were merged into the new unitary authority of Buckinghamshire Council.