To assess impact of the boundary changes various organisation calculated results of 2019 election if it was conducted under boundaries established by 2023 Periodic review. Below is such assessment from BBC for Barnsley North:
Notional result of 2019 election under new (2023) boundaries
^After nominations for the 2024 general election closed, Reform UK withdrew support for Lomas on the 29 June, after reports of alleged racist comments.[8]