Boris Johnson has lent his support to Rishi Sunak on the campaign trail as pollsters forecast their party could "win a lower share of the vote than at any past general election". At a rally on Tuesday, Mr Sunak hailed the "Conservative family united" after an appearance by his predecessor Mr Johnson and claimed just 130,000 voters could help stem his party's predicted losses.

Boris Johnson has lent his support to Rishi Sunak on the campaign trail as pollsters forecast their party could "win a lower share of the vote than at any past general election".