Guinness..

 ..if you didn't know it yet is the new fad drink for the (not so) discerning GenZ and Millenials. So its out with G&T  and in with the sub-standard Oirish stout, (Magners meanwhile remains just a distant fad memory).

Hang around any 'trad pub' in London these days and you can't help but overhear the more youthful clientele wanking on about how  Pub X serves the best Guinness in town - 'it's the way they keep it', 'they get it specially from  from Dublin you know' etc.. So let's get a couple of things clear

    1) Its a pressurised keg beer these days (in fact since the 60s*)  - it's almost impossible to fuck it up -     like opening a can. So no, Pub X serves precisely the same chilled crap as Pub Y.

    2) All Guinness in the British Isles has been brewed in Dublin since they shut the London Park Royal brewery in  2005. That said they are planning a MicroBrewery in Covent Garden no doubt to pacify the braying hordes.

* prior there was some real effort required to pour a decent  pint as it used a 'two barrel' process - one effectively provided the froth/head and a small amount of fizzy body and a much flatter barrel the main volume. The head was poured first left to settle and teh main poured down the side.