I don’t think I’ve ever been on IMDB and not found what I am looking for. Personally I never bother with the UK website, use the American one. If we all waiting for film to come out in the UK we’d be retiring by the time we got to watch them. It’s very easy to find what you are looking for on the IMDB website, the search facility is on the first page so you don’t have to look for it! From there you can search by movie title/actor etc. Once in the actual film’s page it will tell you what the films about, give it marks out of ten and most of the time have reviews written by other people. You can write a review too if you want to. It also has a cast like and if you click on an actor/ress it will tell you what else they have been in and when.
Apart from the movie database they have information on movies coming soon, cinema charts and news. The pages always download very quickly compared to other sites and the information is well laid out and clear. If I ever want to find out anything about movies I always use this website, the information is always accurate and easy to find and, most important, kept up to date!