Need help, A decision.

[TrailRat]

Firstly, I'm new so please forgive any faux pas.

I'm looking for a Martial Art to help with an anger issue I have. It's
medical and I've had it since I was a kid. I have only just realised I
need help. I've been told MA can help discipline the mind and now on a
search for something that would help but there are a lot to choose
from. Ideally this would be something that could be done alone.

I live in North London, in good health and an amueter <sic?>
competition mountain biker.

Any advice would be greatly appreicated.

TR