Continuity codes
A = Continuing [same school]
B = Continuing [diff school]
C = Leaving, continuation uncertain
D = Moved to private lessons
E = Ceased - financial
F = Ceased - engagement
G = Ceased - suitability for instrument
H = Changed instrument
I = Ceased - academic
J = Ceased - Y11 / 13 leaver
K = Ceased - School withdrawn from HMS teaching
L = Completed course - short course
( i.e lessons leading up to Grade 5 theory exam)