There's also the BFI shop in Southbank (Waterloo) next to the Royal Festival Hall. If you have any time I recommend watching a film there as well.
BFI have currently got a Victor Erice season on this month & on another note Kiyoshi Kurosawa's 1985 pink film
Bumpkin Soup (which i think Third window will release) gets a rare big screen outing on Tuesday (April 9th) at the BFI so worth going to see.
https://www.london-tourist-guide.com...he%20building.