Really? I would have thought we could, but only from Saturday morning. I believe they are contracted, and therefore obligated, to attempt delivery once and only then can we make arrangements to collect. But I could be wrong.
As a sidenote I had a delivery by UK Mail a coule of weeks ago and I got home to find a card saying they missed me and would attempt redelivery the next working day. 2 hours later there was a knock on the door. He'd come back! Probably can't expect that on iPhone Friday, they'll be a bit busy, but it could happen.