Any groups or individuals in London England?

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I stumbled across the joy of satan website whilst doing some research.
I currently neither follow nor condemn Satanism, however I was intrigued by what I read on the website and would like to know more about it.
I was wondering if there we're any groups or individuals in or around London England who would be prepared to meet and talk to me about this.

I would like to be clear that at this point my interest is academic, and whilst I have never practised myself I certainly mean no ill will to you or your beliefs I merely wish to learn more about it.