Well, I heard that Scots and Irish get on quite well, so...
It really depends on various factors.
Enough Irish don't get on with other Irish, Scots the same, ditto the English.
North and South Welsh aren't always best of friends.
Otherwise, in Britain, we're like one big happy family.
There are loads of brilliant and beautiful accents across the British Isles.
Even the West Midlands doesn't always sound hideous!