@Blickers,
Farage is a minor figure. UKIP got a lot of MEPs purely because people couldn't be bothered to vote in European elections, only the committed bothered, that and PR. In Westminster they've only managed one, Douglas Carswell who defected from the Tories and now has left UKIP. He's no way near as important as you Americans think he is.
Most British people hold Wotsit Hitler in contempt anyway, his withdrawal from the Paris accord, along with his attack on the London mayor was expected.
Brexit and the Paris accord are two separate things, if Corbyn gets in, (still highly unlikely,) he will condemn Trumps decisions along with other World leaders unlike May whose approach to Wotsit Hitler is supine.
As for Brexit both Corbyn and May have committed themselves to it, the only party opting for a second referendum are the Liberals but nobody trusts them. If there's a hung parliament and Corbyn relies on Liberal votes then a second referendum may be the price for their support, but there's a lot of ifs and buts.
We'll have a better idea on Friday.
Just to clarify, Trump's decision re Paris accord will not affect peoples' voting intentions, and Corbyn is committed to Brexit.