The constituency has been represented in the House of Commons of the UK Parliament by Andrew Murrison, a Conservative, since its inauguration in 2010.

[note 1] The constituency was created for the 2010 general election, following the Fifth Periodic Review of Westminster constituencies tasked to the Boundary Commission, by which Parliament increased the number of seats in the county from six to seven.

[2] The previous Westbury constituency was abolished: the northern part (including the town of Bradford-on-Avon) was transferred to the reinstated Chippenham seat, and the southern part (including the towns of Trowbridge, Warminster, and Westbury) formed the bulk of this constituency, which to complete it, received a minority of wards from the Salisbury seat.

2024–present: Further to the 2023 Periodic Review of Westminster constituencies which came into effect for the 2024 United Kingdom general election, the constituency is composed of the following (as they existed on 4 May 2021): In order to bring the electorate within the permitted range, Tisbury and the Nadder Valley were transferred to Salisbury.

The village of Hilperton was added from Chippenham, while several rural parishes east of Trowbridge were transferred to Melksham and Devizes.