As long as it is done "In-House"....and particularly in the UK where the "Old Boy" network is at the helm.....(for Check Pilots checking Check Pilots)....at best the system is "incestuous" and we know how that turns out.
At least in the US FAA system....Check Pilots get checked by the FAA....which doesn't prevent bastardy...but it does help.
But then....there a few more pilots and helicopters in the USA than in the UK.
How many Operators insist upon a third party review of their Operation....and look for a really "Independent" review with a goal of seeking weaknesses and finding solutions or improvements?
How many are willing to admit they perhaps do not have the single unique path to salvation re Operational Procedures, Standards, Industry Best Practices, and Safety Environment?
Can you name just one?
Before you utter a single type written word.....SM...."Shell" by God sure ain't one of them?