By Lars Mucklejohn The Treasury has reportedly raised questions with the UK payments regulator over the timetable for its new fraud refund rules that have stirred alarm among banks and fintechs. The measures, due to force payment firms to refund victims of authorised push payment (APP) fraud up to a limit of £415,000, have prompted concern from both the former Conservative and current Labour governments over fears they could encourage more scams and be unaffordable for smaller businesses. Treasury officials under new Chancellor Rachel Reeves have spoken to the Payments System Regulator (PSR) a…