When I picked up a Kelly from Cadogan Place the manager emailed us and asked us to come in early in the morning before or just at standard opening if I recall, he had all the orders out and the customers would be shown their bag in the leather goods section and then go to the counter to pay. No one except staff and clients with bags was in so it was quite relaxed as no one was there eyeing up your items. However, I think most deliveries now occur in the early afternoon so this may no longer be the case.