Mr Osborne, the Chancellor, has said that he would only support the introduction of the tax on a global basis, because financial trading would simply move from London to other markets such as New York and Singapore. American and Asian governments are thought to be opposed to the levy. Government sources declined to comment on the archbishop’s intervention last night. Dr Williams also called for wider controls on banks, saying they should be compelled to help “reinvigorate” the economy and not put the public’s savings at risk.