Wrong - seems on searching, at least both Sony and Samsung have this functionality intentionally restricted, as far as I can tell. I see comments about how changing region on a Samsung can re-enable recording. Which quite frankly, is ridiculous. I wonder if this is some rubbish broadcaster influence where they won't let them have the on demand apps if recording is available.
It seems we're not alone either, there are some footnotes on sony UK's site that USB recording is not possible for TVs setup to work with BBC's on demand system. Urgh, yuck.
Do any of the brands (perhaps panasonic or LG) offer USB Recording of Freeview content?