The race in rural Louth and Horncastle, a previously unassailable Tory seat, encapsulates Reform’s real threat

• UK general election live: latest updates

As the traders pack up under the striped awnings of the market stalls in the centre of Alford, east Lincolnshire, Matthew Warner is loading balls of wool from his family shop into the back of his car.

Warner, a father of two, is feeling a serious strain on the family finances from fuel prices and childcare, and his wife cannot work full-time hours as a nurse because of the costs. A longtime Tory voter, the 33-year-old is still undecided on who he will vote for on Thursday, but he says he is now attracted by Nigel Farage’s Reform party, who are making significant inroads in seats like this.

Exclusive: shadow energy security secretary promises to fill ‘vacuum’ left by Rishi Sunak’s U-turn on net zero

• General election live: latest updates

Labour will promise to take the lead on global efforts to tackle the climate crisis, filling a “vacuum of leadership” on the world stage and proving Rishi Sunak’s U-turn on net zero has been a “historic mistake”, Ed Miliband has said.

The shadow energy security and net zero secretary said the UK needed to change course and was “off track”.