One of my favourite brunch destinations in London is the Breakfast Club in Hoxton (there are a few other locations, too). Although the queues can be enormously long at times and they don't take bookings sadly, Joe and I have managed to go a few times when the Q wasn't too bad and in turn the breakfast has been delicious!! The first time we went Joe ordered a Bloody Mary and got a whole pint full of it. Luckily it was very good. The food portions are huge and the prices are totally acceptable considering the portions. If you do ever find yourself in London and in need of a great breakfast / brunch I urge you to try out this place and I'll have my fingers crossed the Q isn't too long that day.