Pedal repair in London?

[project_c]

I have a possible fault with a noisy preamp pedal (high pitched noise when running off mains, but I don't think it's a ground loop issue). Do you guys know of anyone who fixes faulty pedals in or around London?

[dannybuoy]

I answered on your TB thread - but your pedal is probably fine if it's silent on a battery, I would try an alternative power supply!