Charity Law in the UK

Set up a charity
https://www.gov.uk/setting-up-charity/set-up-a-charity

How to set up a charity (CC21a)
https://www.gov.uk/guidance/how-to-set-up-a-charity-cc21a

What makes a charity (CC4)
https://www.gov.uk/government/publications/what-makes-a-charity-cc4/what-makes-a-charity-cc4#part-2-about-charitable-purposes