Long time lurker, first time poster, just had to answer this one.
You may have noticed with other UK online retailers, particularly ones like Amazon or that use UKMail (as Apple does in the country), that you can often select a 'Deliver to location' option. A growing network of corner shops and university campuses now offer a parcel service, so you can have it delivered to themif you'll be out of the house and don't want to miss the delivery, or it's just closer to your work, say.
So you're not really getting a pick up from the Apple store in the strictest sense, you're just having the delivery made to a third party.