In the early days of the Hawk I believe a few pilots did push the high speed dive to see if it would go supersonic. I recall some of the old hands like Dougie Mee saying not to bother as it became rather unstable in the transonic region. The English Electric Lightning on the other hand would slip through Mach 1 with ease in cold power as I came close to doing over Louth Lincs in 1985. I thought the recent boom incident was a QRA scramble?