As I said in my post, it was for over an hour yesterday, everything was gone from the website. Its of course fine now.
Presumably not during that time I mentioned above. Plus as I said, direct links to products worked, such as the GoPro which I could see. However, clicking on an item, or trying to find an item through regular listings, there were no products whatsoever on the website.
All I'm trying to point out is that there was clearly some reason why a major retailer would temporarily hide all its products.