You’re in search of a translation agency, one you can pick up the phone and pitch questions to at any time during the project. Ideally one you can meet in person before you begin. You’re based in London and you’d ideally start your search there. But how necessary is it to restrict your search to a 25 mile radius? Not at all, I’d suggest. You see, we often work with clients at either end of the country and have no trouble communicating by phone and email with the very occasional face-to-face to clarify project start/delivery issues.