Does anyone use one of these companies e.g. http://www.mbe.co.uk/mailbox_services/ to receive mail / packages / etc. that you may not want other members of your household to know about. Also useful for taking deliveries for you whilst at work etc. I guess.

Are they discreet? I see that the one I mentioned wants to know your home address and have some proof of ID before setting up your mailbox. I would hope they wouldn't actually send anything to your home address, such as an invoice etc.?