I remember this too. However, again if I remember correctly, someone was told by UK Mail that due to the increased workload in delivering iPhones on launch day, they cannot guarantee the delivery time slot and it should be ignored. Some people missed their delivery which happened outside the slot they were given.
Well since we can see what street it's on, I'm going to drive around and find that driver haha. Only joking *looks around for reassurance, but wasn't actually joking*