I seem to remember from ordering my n810 that Nokia doesn't use Royal Mail for delivery (or not for express delivery)
Mobile Phones Direct currently uses Royal Mail special delivery to dispatch your new phone. Due to distant selling regulations set by the Networks, all phones must be sent to the customers billing address as supplied for your network credit check. If you or another authorised person are not available to sign for the parcel, then you will be supplied with a card with your delivery reference and a contact telephone number for Royal mail. Your package will then be stored at the local sorting office where you can arrange to collect it, or have the goods delivered on an alternative date.
We cannot be held responsible for disruption to shipping caused by industrial disputes or action outside our direct control. If such disruption occurs you will be offered delivery via an alternative delivery or fulfilment company or a full refund.