"I'm afraid they tend to look more like perfume bottles," Alcina says apologetically. "But for a high-end item like this, I can offer you a very reliable glamour to disguise it however you like, at only a small extra charge. Fully customizeable."

She's leading the way down one of the innumerable little side aisles as she speaks, and stops at a polished wooden cupboard with a glittering purple scarf draped decoratively from one of its door handles.