Hi Alishan
First of all, it's not compulsory to have anything. There is no law at present to stop you from just teaching.
As the Chairman of the Martial Arts Standards Agency I can tell you it's
advisable to have the 'MASA Five' these are:
1. A Black Belt or equivalent in the martial art being taught.
2. An approved coaching qualification (NVQ or equivalent).
3. £5 million Professional Indemnity Insurance.
4. An enhanced CRB disclosure.
5. A clear pricing policy with no hidden charges.
If you go the MASA website at
www.masa.org.uk you can download a full set of standards for free that will give you everything you need to run a club or association in the UK. If you go to the resources page there are links to the people that can provide anything you don't have.
My advice is to remain independent and get everything you need without joining a governing body as they have a habit of over charging, going bankrupt and having draconian rules.