The London local elections of 2006 were painful for Labour, with the party – then in government with Tony Blair in his penultimate year as prime minister – losing eight councils across the capital and ending up with the lowest number of seats since the 1960s. But there was one stand-out success: a landslide win in Lambeth, south London, where then local campaign chief Morgan McSweeney, who would go on to lead Keir Starmer into No 10, helped secu…