many people find a way to address all this by using the program laid out in AA.
there will be hundreds of AA meetings in London, no doubt.
there will also be secular meetings, such as SMART and maybe LifeRing.
i know you have said you are shy, and that it can be very tough to start going to a meeting (was one of the hardest things i have ever done), but it is necessary to make changes, and in order to do that i had to do some things i absolutely did not want to do, or thought impossible for me to do.