In the UK what are the legal measures to take when working self employed through the internet?

I keep being told I need to go to a local business center to discuss things. Unless it's necessary I don't want to do, if I'm working with international clients only through the internet I don't see why I need to get involved with local businesses, I also plan on moving from the area soon. Is it... show more I keep being told I need to go to a local business center to discuss things. Unless it's necessary I don't want to do, if I'm working with international clients only through the internet I don't see why I need to get involved with local businesses, I also plan on moving from the area soon.
Is it necessary, what are the basic things I need to do to follow the law.

Let the council know? Keep a financial record?

Currently I only get work once a month but I want to advertise and try making it work full time.
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