The Hallingburys new MP Chris Vince is among the Labour politicians pressing the Government to quantify the cost of fraud and error to the public purse. Mr Vince, whose Harlow constituency also includes Hatfield Broad Oak and Hatfield Heath, joined Tom Rutland, MP for East Worthing and Shoreham and Ealing Central and Acton’s Rupa Huq to press Chancellor of the Duchy of Lancaster Pat McFadden about the bill racked up by Government departments and agencies. He told them: “Estimates of the amount of money lost to fraud and error vary hugely, in truth: the latest estimate has a range of between £4…