I know the gentleman who had the unfortunate incident. Over a beer one evening he told me what happened.
The letter to Pilot was was initiated because of the very holier-than-thou tone of the GASIL article and as the accident report had yet to be published is almost sub-judice.
GASIL arrived a week after my conversation with BB and I thought it was a bit OTT.
Low level aerobatics/showing off really are not part of this chap's repertoire. We do all make mistakes.
As far as I am aware there is no legal requirement to insure an aircraft in the UK.
Stik