The Lib Dems are a weird UK party formed in the 80s from the ashes of the 'Liberal Party' that was founded in the 1850s. Their platform has been all over the shop - they've managed to outdo Labour in welfare spending and outdo Conservatives in welfare cuts. They've promised to cut tuition fees and raised them. They've supported wars and ceasefires.
Who votes for them? Mostly Tory voters who are dissatisfied with the aesthetic of voting Tory. The best way to reason about the views of a UK constituency where the Lib Dems and Tories are fighting it out is with this handy dead meme:
Should poor people have rights?
I promise those are the meme's original colours. I like it when the stars align like that.