The seat currently covers the Borough of Slough, with the exception of the Colnbrook with Poyle ward, which is included in the Windsor constituency.

[2] The borough has one of the largest mixed commercial (company headquarters and manufacturing) estates in Europe and fast rail links to London on the Great Western Main Line, to be bolstered by direct city centre services with Crossrail.

The Borough of Slough wards of Baylis, Britwell, Central, Chalvey, Cippenham, Farnham, Haymill, Kedermister, Langley St Mary's, Stoke, Upton, and Wexham Lea.

The Borough of Slough wards of Baylis and Stoke, Britwell, Central, Chalvey, Cippenham Green, Cippenham Meadows, Farnham, Foxborough, Haymill, Langley Kedermister, Langley St Mary's, Upton, and Wexham Lea.

Under the 2023 Periodic Review of Westminster constituencies which came into effect for 2024 general election, the composition of the constituency was reduced to bring its electorate within the permitted range by transferring back the Foxborough ward to Windsor, along with the Langley Kedermister ward (as they existed at 1 December 2020).