Sandy was already a legend at the ICAO school I attended in the early '80's in Trinidad. He coached students in 3 or 4 subjects simultaneously.... and managed to make us all comprehend the incomprehensible.
I'm sorry to hear he has left us but glad that he managed to keep working for so long. I know he really enjoyed helping so many achieve their dreams.
I can't make it to Coventry on the 2nd but will be there in spirit.
R.I.P.