London is so vast I am forever coming across new hidden gems. Walking around the streets and getting lost is the best way to find London's best kept secrets.
It's a members-only library but you might be granted access with a research request. The writer's room is great but there's a few special, hidden corners among the bookshelves to tuck yourself away in.
In terms of materials and form, these galleries offer so much. On an abstract and typographic level, so useful. This is a section of an altar frieze, from the Eye Temple at Tell Brak (N.E. Syria), dated 3300–3000BC. The Egyptian rooms take the tourist weight; these spaces are much quieter and amenable time spent drawing and thinking.
Wonderful place for an indulgent afternoon tea. My favourite room is the millennial pink bathed Gallery room where the walls are covered in a sea of original David Shrigley art. The bathrooms feature beautifully designed individual egg-like pods and there's even a waiter whose sole focus is to serve you caviar.