"Will my items arrive in a single package?"
Probably not — for logistical reasons, we often send items in separate packages, even when you order them in a single purchase.
If you order multiples of the exact same product then of course we usually can send these in a single package — unless the shipment would have a total value greater than £135.00, in which case we will send multiple packages if possible so that your order does not attract customs duty or import VAT. (See our answer to "What about customs duty and import VAT?")