For a good range of top brand torches and knives, A-Z Electrical, 60 Brewer Street, London, W1, they also sell the full range of S-Biners and lots of tools, etc, which have practical outdoor use.
Whilst not specifically bushcraft, the Algerian Coffee Stores, 52 Old Compton Street, London, W1 is an
absolute must visit place if you love the aroma of coffee beans and tea, they also serve superb coffee
(no seating, you stand in, or out of the shop to drink) their range of edible goodies is fabulous (Italian strawberry nougat, chocolate covered coffee beans and chocolate covered marzipan being my favorite trio!).
These two stores are within five minutes walk of each other.