The London branch of the Irish chain, serving beers mainly from the company's own Dublin brewery. The modern building, a short distance from the centre of Covent Garden, is on the site where J.M. Turner used to live, inspiring the name of the house cask ale: Turner's Sticklebract Bitter.
The usual Porterhouse range is on tap and there's the standard large selection of bottled imports.
I was only here once, on a warm Sunday afternoon in June (edit: the picture is from a later walkpast), and I'm not minded to go back. The giant premises were heaving with loud punters, locals and tourists alike, and every flat surface was covered in sticky stale beer.
The layout has been designed to maximise drinking space, so it manages to be both cavernously soulless while also poky and uncomfortable.
The Porterhouse's Irish branches are a very welcome break from the dominance of macrobrewed dullness in the beer market there; in London you would be mad to seek this place out when the city is bursting with decent pubs selling great beer.