Not in the UK, but from Romania, I last checked Tripadvisor back in 2012, and that was for a holiday stay in the Greek islands. Google Maps has eaten the lunch of almost all of the entrants in this space, and I say that having worked for a local/Romanian "Google places"-type of company, back in 2010-2012 (after which Google Places came in, ~~stole~~ scrapped some of our data and some of our direct competitor's data and put us both out of that business).