A fantastic sim operator, sim builder, and a great mimic.
I had many sim sessions with him, in Stansted and later Gatwick.
The old HS was a pleasure to fly, except for the occasional person walking accross the sky with a mug of coffee in hand, was suprisingly realistic, due to his involvement, no level D here.
Even the CAA ITE sessions were (with 20/20) a learning experience.
He made sim learning a pleasurable and regarding experience.
Nothing more to add.
glf