I thought I should mention that I too have bought phones in the past at insanely late times in the day and they still turned up first thing next day by Royal Mail Special Delivery. I think big contracts are able to ship a lot later than usual.

That said, I have just walked down to Sainsburys to get some milk and already that transaction is showing on my available balance but no N900 related amount is missing yet. I really would have expected them to have started billing people by now.