Three economic heavyweights have been brought in to advise Andy Burnham as he attempts to reassure the markets before his return to parliament and possible challenge to Keir Starmer.

Burnham is understood to be getting advice from Andy Haldane, a former Bank of England chief economist, as well as Richard Hughes, a former chair of the Office for Budget Responsibility and Jim O’Neill, a crossbench peer and former Treasury minister who worked on George Osborne’s “Northern Powerhouse”.