If you only brunch once in London, make it Caravan in King's Cross for the Korean fried chicken on a kimchi pancake (£18.50), or Balthazar in Covent Garden if you want a grand room close to the sights. For pancakes, it's Granger & Co's ricotta hotcakes (£19) in Notting Hill. For something you won't find at home, Aram's Syrian brunch at Somerset House. A main brunch plate in London costs about £13 to £19, and most places add an 11% to 15% service charge.
The places are grouped by area, central first, then west, north, east and south of the river, so you can eat near that day's plans instead of crossing the city. Every card names the nearest station on the Tube (the subway) and the walk from it. If you're still building the day around brunch, the best things to do in London covers the sights near each of these. And if you just want a flat white and a pastry rather than a sit-down meal, my London café guide is the better page.
The thing that catches visitors out is the weekend queue. Several of the most popular brunch spots don't take bookings at all, and the ones that do fill up days ahead for Saturday and Sunday. Each card says which is which. Bottomless deals, with unlimited prosecco on a timer, aren't covered here; this guide is about the food.