From the decadent, moss-like carpet and heady, polished-leather smell of Foster & Son’s shop floor, you’d never guess that through a secret mirrored door is a rabbit warren-like studio with hundreds of wooden lasts — the shoemakers’ casts used to create perfect-fit leather footwear. Surrounded by houseplants, well-handled tools, papers and countless tins of oils and polishes, Emma Lakin, the shop’s pattern cutter, and her team work on bespoke boots for an international clientele.