The opening articles fix the name, the short name the document uses (Club, Association, Society or Group), the base or area of activity and the objects, which limit what the funds can be spent on. Membership is open to anyone who supports the objects, with a written application, a register kept by the secretary and optional junior membership for under-18s, who take part but cannot vote or hold office. Subscriptions can be set each year by the AGM, fixed in the constitution or left out.
The committee has a minimum and maximum size you choose, three officers (chairperson, secretary and treasurer), annual elections with nominations 21 days ahead, co-option capped at one-third and a clear list of the ways a committee member leaves office. Conflicts of interest must be declared and minuted. General meetings run on 14 clear days' notice, a quorum you set, one vote per full member and no proxies, and an inquorate adjourned meeting can never amend the constitution, incorporate or dissolve the club.
The protective clauses are where a home-made constitution usually falls short. Every payment needs two unrelated signatories, long commitments need a general meeting's approval, and the accounts go to an independent examiner. Property is held by two to four holding trustees, committee members acting in good faith are indemnified out of club funds, and public liability insurance is compulsory. The closing articles cover data protection, alcohol licensing, incorporation, disputes, amendments by a two-thirds majority and dissolution, with surplus assets going to a registered charity for a charitable group and, otherwise, to a similar body or, if the members choose, to the full members in equal shares.