Don:

5 years in a different part of opposition would give the LDs no more practical experience of anything than they have now.

The idea that the conservatives (or any other party) would feel constrained by an opposition is so novel as to be incredible - unless they risked losing a vote of confidence.   

The Brown/Darling axis has done incredibly well in the face of an economic crisis caused by the hangover of conservative get-rich-quick policies. Its vulnerability lies in other areas - but on all of which the conservatives are still the party of injustice. Cameron is only a thin-lipped smile on the face of Combat 13-20.