Most supermarkets seem to have a decent selection nowadays, usually Brewdog, Northern Monk, Vocation, some local breweries, and then a few more choices that seem unique to each chain.
I've not been in Morrison's for a while, but when I did yesterday our local one had expanded it's range, as you can see from the photo below, and brought plenty of new stuff in, I even found a few bottles of Kwak.
This Botanicalist was one of the new ones, and you can actually taste the gin type flavours in it, quite a nice change from the usual hop explosion.