Canteen looks like a cross between a school cafeteria and a minimalistic Scandinavian diner. Serving simple, traditional British food, their philosophy is clear: sustainable, seasonal, honest, fresh. 

I really like this venue. Even when full of people (and you most likely will have to share a table with someone else if you come in the evening) the buzz never gets overbearing, despite the clean, almost spartan design and decor. This is the place to go for dishes like sausage and mash, shepherd’s pie, fish and chips or macaroni cheese bake.

They also serve breakfast (although they don’t open until 08:00), and having the most important meal in this lovely venue is not a bad start to the day.

Their beer selection is excellent, and for when summer comes around they have a big outdoor area in front of the restaurant where said beers can be enjoyed while watching all the people going by on their way to South Bank, the National Theatre or any of the other many attractions nearby.

Suggested by Manne, thank you very much!