He added: "As I travel the country, one of the most common complaints of party members is that they feel their hard work on the doorstep is often undermined by ill-discipline and briefing within the Westminster village." Mr McCartney, who still describes himself as the "Socialist MP for Makerfield" on his notepaper, said he had "credibility" as a bridge between the Government and the party. He also highlighted his role in easing tensions between Mr Blair and union leaders.