To become a BJA Coach or review the requirements of each qualification please follow the link to BJA Coaching Qualifications https://www.britishjudo.org.uk/my-judo/coaching/qualifications/
The requirements for revalidation are shown on the link BJA Coach revalidation criteria https://www.britishjudo.org.uk/my-judo/coaching/revalidation/
Conduct of a Coach needs to be exemplary and the link will take you to the BJA Coaching Code of Conduct https://www.britishjudo.org.uk/wp-content/uploads/2019/12/Coaches-Codes-of-Conduct-and-Ethics-January-2020.pdf
There are a number of coaching courses that can be attained through an online platform. This lnk will take you to the BJA online learning portal https://www.britishjudo.org.uk/my-judo/coaching/online-learning-portal/
Kata is an integral part of judo and coaching. The links below take you to BJA Kata Resources and Videos.
BJA Kata Resources (exams, text books) https://www.britishjudo.org.uk/my-judo/kata/kata-resources/