2010–2024: The former
District of West Wiltshire wards of Dilton Marsh, Ethandune, Mid Wylye Valley, Shearwater, Southwick and Wingfield, Summerham, Trowbridge Adcroft, Trowbridge College, Trowbridge Drynham, Trowbridge John of Gaunt, Trowbridge Park, Warminster East, Warminster West, Westbury Ham, and Westbury Laverton, and the former
District of Salisbury wards of Donhead, Fonthill and Nadder, Knoyle, Tisbury and Fovant, and Western and Mere.
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): • The Wiltshire electoral divisions of: Ethandune; Hilperton; Mere; Southwick; Trowbridge Adcroft; Trowbridge Central; Trowbridge Drynham; Trowbridge Grove; Trowbridge Lambrok; Trowbridge Park; Trowbridge Paxcroft; Warminster Broadway; Warminster East; Warminster North & Rural; Warminster West; Westbury East; Westbury North; Westbury West; Wylye Valley.
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. ==Constituency profile==