Here's the Boundary Commission review for Buckingham and Aylesbury constituencies.
Note references to transfer of Edlesborough, Pitstone & Cheddington, Oakfield & Bierton, Watermead, and Wingrave from the Buckingham constituency to the Aylesbury constituency.
63 The Borough of Milton Keynes is currently divided into two constituencies, both of which have electorates above the 5% limit. Additionally, the local government ward boundaries in the borough have also been modified. In order to reduce the electorates of the two Milton Keynes constituencies it is necessary to cross the boundary between the Borough of Milton Keynes and Buckinghamshire. We therefore propose to include the Wolverton and Stony Stratford wards of the Borough of Milton Keynes in our proposed Buckingham constituency. We consider these two wards the most appropriate to include in a cross-county constituency due to the communication links between the county and the borough. We did investigate whether to include wards from the Bletchley area in the Buckingham constituency, but considered this would be likely to divide the Bletchley area between constituencies