Hello Down Three Greens
Regarding your answer to question number six, I’m not quite sure whether you meant it was a Trident that crashed on 22 October 1963, or whether you just meant an aircraft was lost!
The aircraft that crashed during test flying on 22 October 1963, near Chicklade, Wiltshire, was in fact a BAC 1-11 (another "T" tail design), and tragically a further BAC 1-11 was also lost during test flying on 20 August 1964.
The Trident which crashed during test flying, and to which I believe you may have been referring, was a Trident 1, G-ARPY, which deep stalled and was lost on 03 June 1966, near Norwich, Norfolk.