Carberry in for Cook and Bell for Morgan makes so much more sense. Trott is not an opener, and Bell has an awful record at 3. Trott's been successful at 3, and Bell is clearly more comfortable down at 6, and has done more there in recent history than Morgan. Morgan has proven himself to be a good back-up batsman, but a top 7 of Strauss, Carberry, Trott, Pietersen, Collingwood, Bell and Prior looks much more solid than Strauss, Trott, Bell, Pietersen, Collingwood, Morgan and Prior AFAIC. That second line-up leads to doubts over 3 positions in the line-up, whereas with the first, only Carberry would be trying to prove himself.