Ashcroft has paid for a
survey (pdf)of 2000 lib-dem votes in lib-dem seats i.e the key lib-dem voters, the ones who'll decide if they retain MPs (as they're not going to be picking up any new ones).
Key figures seem to be 36% of Lib Dem voters say they
wouldn’t have voted Lib Dem at the last election had they known the party was going to enter coalition with the Conservatives -and 46% say they won't vote lib-dem again - that's in
existing lib-dem seats remember, where support may be taken to be harder than elsewhere. If that feeds through to the next general election they're going to lose all their south-west seats and all their city seats.
If you look at how these lib-dem voters with lib-dem seats feel about how the coalition has gone only small minorities believe they've achieved anything good from the coalition, which gives grounds for suggesting that the figures may yet worsen before 2015. The absolute
best finding was that 37% though they'd managed to improve welfare. Their best result.
A gap is also clearly opening up between the position that the coalition was the right thing to do in the circumstances
at that time and that they're doing well/the right thing
today. Previously support for the former view was pretty firmly attached to support for the latter - it's no longer. That's a really useful gap/contradiction that should be worked on.