Conservative Party

On 16 July, Conservative candidate Antony Little regained Old Catton in Norfolk from Reform UK, which had taken the seat only ten weeks earlier by 1,006 votes. The party also gained Dereham Toftwood from Labour the same day.

Losses followed. In the by-elections of 30 July and 6 August, Reform took Snettisham, Heacham and Long Sutton from the Conservatives and an Independent, and The Greens took Hooley, Merstham and Netherne in Reigate and Banstead from them. On 27 August the party lost a Dover District Council ward to The Greens, while in Wandsworth's Trinity ward it finished second to Labour by 127 votes.

YouGov's 31 May to 1 June poll put the Conservative Party on 18%, tied with Labour for the first time since 2024, with Reform UK on 27%. In its 12-13 July fieldwork the party stood on 19%, level with Labour and five points behind Reform.

The first YouGov poll after Andy Burnham became prime minister, published on 20 July, put the Conservatives on 21%, two points behind Reform on 23% and one ahead of Labour on 20%. Other pollsters disagreed on how far Labour had recovered: Deltapoll had Labour level with Reform on 28%.

An Electoral Calculus model published on 7 April had projected that the Scottish Conservatives would hold no constituency seats, the first time since 1999. The 7 May Holyrood election left the Scottish Conservatives with 12 seats, their smallest result since 1999. They lost all five of their constituency MSPs, so every remaining seat came from the regional lists, and Scottish Labour, on 17, took over as the official opposition.

Scottish leader Russell Findlay refused to resign. On 14 May he answered leadership pressure by appointing both potential rivals, Murdo Fraser and Meghan Gallacher, to frontbench posts.