If you're in the UK, there's no further customs to go through. It would be easy to pick up the package by 5pm and get it delivered to the UK next day.OK mine is due tomorrow as well but by Fedex. The fact it has not been picked up yet makes me doubt about the tomorrow delivery knowing it will have to go through customs
If you're not in the UK then, there will be customs issues on the way out to you, yes.
(Update: my parcel status with DPD has changed to : We've received your order details, and we're expecting your parcel shortly)