Re: Well at least
Screwfix uses a similar model to Argos, in that they have a huge amount of stock piled up for the size of the shop because it is all mostly behind the counter.
It saves on overheads etc. but like Argos (and indeed online shopping) you can't really properly see what you're getting until you're getting it. No big deal if you know what you want/need, but sometimes it was nice just to browse Maplins.