Here is a complete scan of a booklet produced by Atari UK in September 1983 detailing Atari's "Factory Authorised Network" of Service Centres in the UK. It's interesting to see just who was involved in repairing Atari equipment at the time, because some of those companies have gone on to become very big in other areas. It's also interesting to note that Atari was still calling itself "Atari International (UK) Inc." at the time and not "Atari UK".