Got any links about those laws in the UK? I'd like to document this on the swpat.org wiki, not sure what to name the page yet thought.
From what I've heard, many countries have such laws but Germany the only country where they're enforced sufficiently to actually scare Microsoft etc. off from spreading patent FUD about free software. In Germany if you want to insinuate patent infringement, you have to specify the patent and the infringing product.
But I've no links about this, it's just stuff that "everyone" says.