AAIB reports do not apportion blame, they merely analyse the facts.
Nevertheless, having been authorised for a 'practice diversion', then cleared to join for Runway 19 for a low approach and ‘go-around’, to me doesn't quite accord with flying down Kidlington's Runway 19 at 500 ft aal and 430 kt.
Fun though that undoubtedly was.
Fortunately, no-one was seriously injured. But what was the overall cost of this 'practice diversion', one wonders?