If it is not convenient for you to collect your completed printing it can send by next business day courier and add the charge added to your invoice. As a guidance the current costs are £10.50 plus VAT for up to about 3,000 sheets of A4, £12.50 plus VAT for up to about 4,000 sheets.  10,000 A4 equivalent sheets comes to £20 plus VAT. My current courier (FedEx UK) is willing to deliver to a neighbour or leave in a safe place (e.g. a porch or even garden shed) if requested in advance.

For quantities up to about 1,000 A4 (or equivalent) it is normally cheaper to send the completed package by Royal Mail 1st class packet post. This normally gets next day delivery, often earlier than the normal postal delivery.