Surprisingly, I think, despite the Liberal Democrats only having a consistent 8-10% in the poll, they will hold on to more seats than people assume. The key question is the collapse in their vote. Where they have MP's they often prove popular, and may hold a loyalty vote. Where they were challenging, yes, they have no chance. All that matters is their vote in the constituencies they hold.
UKIP vs Lib Dems match bet
UKIP 2/5
LD 7/4
Quite tempted by the Lib Dems price.
http://www.oddschecker.com/politics/british-politics/next-uk-general-election/match-bet