Used it for the first time today to order up some kitchen doors. All went ok, although it's very slow.
Go to checkout, and it asks for my house number and postcode, and up comes the correct address. Fill in everything else and try to proceed. Nothing. Thinking it something my RISC OS browser can't cope with I do it all again on the PC card. Which was even slower...
Turns out the 'county' field wasn't filled in. Don't think I've got one, so I just put in Balham which seemed to satisfy it.
What's the point of them having a postcode database if their system doesn't believe it?