British Prime Minister Liz Truss on Sunday conceded she should have "laid the ground better" for last month's debt-fuelled mini-budget, which slashed taxes for the wealthiest and prompted market turmoil.

"I do stand by the package we announced... but I do accept we should have laid the ground better there," Truss said in a BBC interview ahead of her ruling Tories' annual conference, adding she had "learned from that".