Researching a ride for Pedal Power Kennington I immediately spotted these magnificent fountains either side of the front entrance to the British Museum, though, as arguably befits a museum, they're dry as a bone and just for show these days.
This is exactly the kind of location that our public building (and I include railway stations) should place attractive, working fountains.
The British Museum has a modern drinking fountain hidden in the basement, at the entrance to the toilets (eurgh), but the water flow is so feeble you'd be forgiven for thinking you might die of thirst while waiting for a group of thirsty school children taking turns to sip.