Kemi Badenoch has warned that Andy Burnham would saddle the UK with a "Burnham premium" on mortgages and borrowing costs

The pound tumbled and the cost of Government debts soared on Friday, with economists predicting the pressure will continue throughout a likely Labour leadership contest.

Kemi Badenoch has warned that Andy Burnham would saddle the UK with a "Burnham premium" on mortgages and borrowing costs