It rains here about one day in three, which is a statistic you only really feel while standing under a bus shelter working out whether the afternoon is still worth it. So everywhere on this site carries a wetness score: how much of the trip is under a roof, how far the door is from the tube, and whether you will walk in looking like you swam.
It is for people who live here and have run out of ideas. For a parent with a small person and two hours to fill. For anyone whose friend is visiting on Saturday and has just seen the forecast quietly dismantle the plan.
It exists because most guides to indoor London are the same twelve attractions in a different order, written by somebody who has never had to cross the city in a downpour. This one is free and there is nothing to log into.
Nine warm places in London for when the rain turns cold: August rain is an inconvenience. November rain is a different product entirely. These nine are picked for heat rather than interest, which turns out to be a better filter than it sounds.
Nine London bars where you can lose at something indoors: Darts, ping pong, axe throwing and virtual clay pigeon shooting. The whole competitive socialising business, judged on the only measure that matters here, which is whether you arrive dry.