The appointment of Peter Mandelson as the UK's ambassador to Washington is like a bad news boomerang for the government. Over and over again the prime minister's most consequential judgement in office circles back into ministers' airspace – and today it will do with gusto. It will be "another one of those weeks" one senior figure said, wearily. The scale of what is to come will be quite something: the largest government publication ever put before the Commons, and therefore us, other than the