Could the Federation of Small Businesses help you?
The Federation of Small Businesses is a UK-wide support body for small businesses and self-employed people. They offer their members help with issues like health & safety, employment law, banking, pensions and more – their website has a full list of member benefits.
Larger community centres and halls in particular might find it useful to join the FSB, to complement the guidance and information that Action Hampshire member organisations can get from us (details here). FSB membership costs £177 for the first year and £147 per year after that.