The mon grading syllabus has been updated by the BJA. You can find the material here: https://www.britishjudo.org.uk/get-started/grading/mon-grade-scheme/
For adults the kyu grading is here:https://www.britishjudo.org.uk/get-started/grading/kyu-grade-scheme/
Useful YouTube videos to support this are here: https://www.youtube.com/@educationaljudo740/videos
Kodokan 100: https://www.youtube.com/playlist?list=PLR9PQn1I0-EzMQOunoVga9XaWjbmCV0fx
