@ehBeth,
Labour has backed Article 50 in parliament, and May has already triggered it - so there is (nearly) a zero chance oof an article 50 u-turn.
I suppose, the Liberal-Democrats will do fine, Labour will stay down (certainly the damaged situation inside Labour was one of the reasons for May's call for a snap election), but who knows if Brexiters back May because she's getting on with it ... ...
May became PM without facing a general election in her own right, so this is her chance to ask voters for her own mandate.
Generally, I do agree with Sturgeon: Tories will use the snap general election to 'move UK to the right and force through hard Brexit' (
link)