Hey Toby!!!
Great to see someone kinda local to me 
I live in the Hounslow area, but I run a class in Whitton and there's also one in the Ham and Petersham area.
The one in Whitton is at Whitton Secondary School, PM me if you're interested in coming to that. I run it twice a week in the afternoons of Tuesday and Friday.
If that's not your flavour, the one in Ham and Petersham is at Ham Youth Club, for 11-19 year olds and is on Thursday afternoons. Google can help you out with that!
Other than that, if you're interested in meeting up when we go out to jam locally, I can text you or email you, just say the word!
Word of advice: Invest in a bike 
One of the best modes of transport ever!
Hope I helped dude!
-Frank