I've never had to claim myself, but my parents claimed quite a hefty amount for subsidance, which not only included the structural work but complete re-decoration of their lounge afterwards.
That was a good 10 years ago, though, so perhaps policies have changed since then and insurers are making it more difficult to claim.
Edit: Obviously my parents' claim wasn't 'contents', so perhaps I've not really answered the OP.
Edited: 13/06/2011 at 18:25