[rob_mccann]

I'm no lawyer, but from my understanding of UK regulartions at least, it depends whether your domain is likely to cause misunderstanding or confusion between the trademark and your site.

If the trademark was for a cookery product and your blog is about cooking it might fall foul but if they're unrelated you might be OK.

You should be able to search for the actual trademark online. If you're worried, seek legal advice.