Gillian Horsup

Once you find this stall (fourth door on the right down an alley, very back of the basement floor), you’ll feel like you’ve struck gold, and you have: There are vintage Lacroix earrings, Dior brooches and piles of English art deco and midcentury sparklers, much of them under £100. Tip: Pay cash and she’ll likely knock off a few quid.

1-7 Davies Mews, 44-207-499-8121, gillianhorsup.com