Approved Driving Instructor
There are 6 grades of 'approved driving instructor' with grade 6 being the highest possible level of achievement. These grades are achieved via regular tests implemented by a senior examiner appointed by the Driving Standards Association.
The current percentages of approved driving instructers are as follows:
Grade 6 - Only 6% of UK driving instructors hold this level.
Grade 5 - 29%.
Grade 4 - 50%.
The remaining percentage is shared between those who are not graded and those graded 3 and below.
Abbey Driving School holds the grade 6 level and is one of only 6% in the UK who has acheived this.