European Bike Polo Championship! London?

Had a chat with a couple of guys at work about how easy it would be to set up London Polo as a charitable organisation. Think it would be worth it for the tax breaks (which might attract sponsors, etc)? Would involve some admin but I'd do a lot of it and I'm sure other people would help too.

This made me muse a little about insurance and pro-bono lawyers, etc, and came across this
"We offer cover on a one-off and/or annual basis for public and employers liability and for the use of the following:

• Black Powder
  
• Pistols
  
• Cannons
  
• Guns
  
• Cavalry
  
• Archery
  
• Combat"
  
  

Sounds like the kind of thing...