in my opinion this is the massive difference between english/welsh/scots/etc pubs that make them so different from pubs in Ireland [north or south] ,
most pubs in ireland are owned by the guy/lady behind the bar, its their life to have it run properly,
any/most pubs Im ever in [in Ireland obviously] are like that, with a few exceptions of a privately rented pub, where the landlord simply pays the owner a rent but has a free hand to make money how he sees fit,
not tied to a brewery,
now, comes the crux, a few years back Tennants [the beer brand] gave grants/interest free loans to a lot of publicans to upgrade the pub with the proviso that they stopped selling draught Harp [the best selling draught beer/lager in Ireland],
a lot of places went down this route, but still sold bottled Harp (mostly), a lot of pubs lost a lot of customers too,
myself, if they dont sell Harp, I wont drink in them.
I find in England that even normal keg lager tastes different in some places, obviously a lot of publicans have NO idea how to keep even keg'ed lager, gawd knows how they deal with real ales etc that some folks call 'beer' .