UK Prime Minister Andy Burnham is facing accusations of a U-turn on political funding reform after correspondence seen by The Guardian revealed he had privately expressed support for capping individual political donations at £500,000 — and reducing that figure over time. Burnham wrote to a campaign activist in May backing the cap as a way to prevent any single donor from exerting undue influence over a political party, but his government has since indicated it will not support amendments to that effect in next week's Elections Bill, which focuses on lowering the voting age to 16 and curbing donations from Britons living abroad. Campaigners including transparency groups and broadcaster Carol Vorderman are pressing Burnham to honour his earlier commitment, while Labour aides insist the government has not ruled out further reforms to domestic donation rules at a later stage.