Don't blame the pilot
Just seen the communications re Keith Sturt. I am absolutely convinced the leading edge of VX770 was damaged before Keith took off. The aircraft had been doing a lot of aerobatics prior to the accident and at Woodford we had a special small man who used to crawl up and down the leading edges to inspect for damage and repair as necessary. I do not believe that Keith exceeded the maximum speed of VX770 which was 300 knots. The aircraft had been doing rolls off the top and I understand on good authority one loop; the maximum permitted g for the aircraft was only 2g and in my experience that probably would not have been enough for the vertical manoeuvres.
It is so easy to blame the pilot when he is not there and of course there was no crash recorder, just a very poor amateur film.
There is a very clear single frame picture of the leading edge coming off.