England's batting has been nothing short of pathetic for a long time now, probably going back to the home series against India in 2011 (an exception in the away tour of India last year too). Every game virtually features a big collapse, rarely do we pile on big scores, every game virtually is run rates below 3. Scores of 400+ have been very scarce since 2011, compare that to 2010-11 when we were piling on 500+ for fun.
Because often there's one player (Bell last series) who performs, and the bowlers usually do their job very well, we've got away with it a lot of the time but that isn't going to keep happening.
Ironically I think most the problem comes with the players being so concerned about getting out they play so negatively they end up cracking under the pressure. As Liam says, we bring Swann on and the Aussies take that as a chance to go offensive, they bought Lyon on and Carberry and Trott/Pieterson went on block mode straight away allowing pressure to build and obviously a mistake to happen.
We've lost this game baring the weather, and the batsmen need to take a serious look at themselves now. Cook, Trott, Pieterson, Prior, Root. Six games now and not one of them has rose to the occasion for more than one match. Frankly its getting to the point I think Trott should be considered for dropping from the test side, usually he was painfully slow but dug in and stuck around. Now he just gets out so easily every time.