I couldn't find any information about this service using the search facility, so I figured it hadn't been reported on.
Smart Muscle Service is a free and confidential London based drop in centre for people who use or are thinking of using AAS. They offer the following support and advice on :-
• Nutrition
• Body Image
• Supplements
• Steroid Advice
• Training
• Goals
• Safer Injecting
• Needle Exchange
• Post Cycle Therapy
More importantly, they offer a needle exchange service. Additionally, if you live in the area, they offer free blood work including liver function tests, pre-cycle, during and post cycle. If you aren't a local resident they can refer you to a local clinic. They collate the usual info for governmental stats -age, gender, sexuality and ethnicity. They are government funded.
Marcus gave me the heads up on a similar service in Manchester, so I was able to find these guys. This is a great service, if you ask me and one which you should take advantage of if you live in London.