Broad needs to get some wicket second innings, one wicket in the 1st Test and one wicket in the 1st innings of the 2nd Test. Add to that a duck in his only innings and he's not justifying his place. With six batsmen in the side his place can be decided on bowling alone, his batting is a bonus but not if he's not scoring any more runs than Anderson, Swann etc
How on earth can you question his place based on 6 days cricket? He's bowled well without reward, but please, continuity is one of the reasons why we've had success over the last couple of years. Going horses for courses like the Aussies are doing will not work. Everyone we could bring in is raw back up and nothing else.