After some years of practice your Master may ask you if you potentially want to become an Instructor.
The training will commence with helping out in class.
Simple chores and assistance.

If you show enthusiasm and competence, your Master may commence teacher training with you.
This formal process of learning will take many months, probably even years.
Once qualified, an Instructor should seek Instructor affiliation and insurance with The Tai Chi Union for Great Britain or equivalent body.