I notice in the latest Decanter magazine, the April one, the wine merchant review is of The Secret Cellar in Tunbridge Wells. I live in Tunbridge Wells and have got to know one of the staff there, James, who is also a Diploma student. They are all a good wine merchant should be - knowledgeable, friendly and, most important of course, they have a great range of wine. If you can't visit then have a look at their web site from where they get a lot of their sales.
I work locally for Oddbins and there is almost no overlap in any of the wines we both stock.