England to be a serious contender for the World Cup has to seriously shuffle its batting order. I'd retain Joyce and Vaughn opening. I think Joyce showed some encouraging signs in Australia opening the batting but as for Vaughn i thinks its only his captaincy that really merits him a position in the team. I would promote Kevin Pietersen to No.3 as it is a waste of his immense talent to bat any lower. He would be the ideal batsmen to come in at 1/0 or 1/100. Collingwood at No.4, Flintoff at No.5 and I'd recall Strauss to bat at No.6. He could re-invent himself as a Mike Hussey stlye finisher in the last few overs. I think its essential in a World Cup to have your best batsmen(KP) having the bulk of the overs to build an innings rather than coming in when the team is in trouble.