The CAA did not ensure it closed a very large hole in the Swiss cheese.
After witnessing the display at Southport the CAA had evidence to suspend or revoke the pilots display authorization. At minimum, had the CAA issued a formal notice of regulatory non-compliance, the pilot may have applied an increased margin of safety (height and distance) to ensure regulatory compliance at subsequent displays.
Some may argue the CAA did not fulfill its duty of care and duty of competence.
The AAIB report neither includes the prior history of illegal maneuvers nor identifies the CAA missed opportunity for more affirmative action to prevent any reoccurrence. Some chump said this was omitted from the report as not relevant. I say it is omitted as convenient.
The Coroner will be made aware of facts regarding CAA misguided priorities and resources involving medical department witch-hunts (proven to be groundless) in the weeks before this accident. Had the CAA applied the same resources and intensity to investigating the non-compliant Southport display, the Shoreham tragedy may have been prevented.
CAA observed Southport display:
https://www.youtube.com/watch?v=ZHngQ8TmqU4
The Telegraph article:
http://www.telegraph.co.uk/news/avia...r-earlier.html