Derby South.

Derby South is a single-city seat, drawn almost entirely from the southern half of Derby itself, a built-up area of some 118,000 people that accounts for effectively the whole constituency. There are no competing towns here: the seat is urban throughout, younger than most with a median age of about 35, and rather more ethnically mixed than the regional norm, with roughly three in five residents recorded as White at the last census. Local services across its nine wards are run by Derby City Council, a single unitary authority, so the place answers to one town hall rather than the split arrangements common in shire seats. A quarter of adults hold a degree, a little below the national figure.

Labour has dominated the recent ward map, taking eighteen of the twenty-seven most-recent contests across the seat, though the picture is not uniform. In the Alvaston wards the recent winners have come from the Reform side, and Chellaston returned an independent, so Labour's strength appears concentrated in the inner and northern wards rather than spread evenly. The parliamentary pattern points the same way but with a clear warning. Labour held the seat in 2024 on 38.8 per cent, well down from the 51 per cent it took in 2019, and the runner-up was no longer the Conservatives but Reform UK, on roughly 23 per cent. Baggy Shanker, Labour and Co-operative, has held the seat since that election.

On the figures available the seat looks broadly Labour-leaning but less secure than its long history suggests, with the second place passing from the Conservatives to Reform and the 2024 margin narrowing. The tenor of recent local coverage has been steady and development-minded, weighted towards regeneration, riverside flood works and council finances rather than open political conflict. As a dense urban seat it records noticeably elevated crime, with drugs and public-order offences each running well above the constituency average. Whether that holds the seat in flux or merely contested is not yet clear.