Bound to cause some lively discussion, this one.
I tend only to buy the ales that are on special offer (4 bottles for £6) and Adnam's Broadside is, in my view, the best that I have regularly found on such an offer. The Badger series are pretty good fall-backs, as are the Ringwood ales and Black sheep, but Broadside is my favourite.
I was delighted when we were at the Things' "do" that Fuller's 1845 was on the 4 for £6 offer in the Chepstow Tesco. That is an absolutely magnificent bottle-conditioned ale, amongst the best, but I don't often see it on the shelves, let alone on an offer of that sort. I had a look in our Tesco when we got back. If it had been there I would have seriously considered Tesco for our weekly shop, even though it is further away than Waitrose, but it wasn't.
So I will go for Broadside.