Lowlander

Jezza says

The beer list here goes from strength to strength and is currently the leading Belgian beer list in any bar in London. There are some non-Belgians including Kona from the US, Tiny Rebel from the UK and slightly less bizarrely, La Trappe Trappist beers from the Netherlands.

Steve says

Ah, The Lowlander. For many drinkers in London this has been their introduction to Belgian Beer & Beer Café culture, myself included. It remains a great place to visit with a good, solid list of Belgian beers with the odd hidden gem, and an occasional surprise if you chat to the staff nicely. Despite many other bars catching up, and occasionally surpassing it, beer list wise it is still the bench mark Belgian bar in London.