Will someone from the UKIP ever be Prime Minister? How does the UKIP feel about the special relationship with us??
They are now at 145 seats, a gain of 127, mostly taken from Labour, by the looks of things. Conservative control of councils has dropped by 12 - expected for the party in power in an off year, but instead of shifting to outright control, these losses have nearly all gone to the category No Overall Control. There is still a majority party, but it's majority is not over 50%.
I seriously doubt UKIP will amount to much ever on the national stage, certainly not as far as becoming PM. They have too much to do to crack our first past the post system to ever really make it. UK politics is an odd thing - we tend to ignore national politics mostly (most wards are reliable votes for the respective parties), but local politics people get rabid over and are willing to experiment with.
As far as the special relationship goes - they are not exactly fond of it, seeing as it tends to get viewed here as decidedly one sided. They'd not scrap it or throw it away, but there would need to be a heck of a lot more persuasion involved. You saw the start of that last year with the Syrian red line thing, where the UK basically said to Obama - go ahead. We'll watch.