AS A former staff journalist on Socialist Worker, Peter Hitchens really should think twice before repeatedly banging on about the one-time Trotskyist affiliations of a fair few New Labour cabinet ministers. Does the expression ‘spent conviction within the meaning of the rehabilitation of offenders act’ really have no meaning to him? Yes, yes. We all know by now that Alistair Darling sold Red Dwarf outside Edinburgh Waverley station, Alan Milburn worked in a Tyneside leftie bookshop nicknamed