however one should also keep in mind a sense of priority
There were nearly 120 fatalities in the UK sector in 40 years. In justifying their directives on EBS and window size the CAA seem to have implied around 30% were people trapped in capsized helicopters.
The real percentage turns out to have been just 9%, 11 people, with just 4 in the last 20 years.
CAP1145 Helicopter Water Impact Survivability Statistics - A Critique
The difference? The CAA included pax incapacitated on impact who were unable to escape and 20 tourists on the way to the Sillies.
Good to see the operators doing some operationally directed research:
Helicopter industry collaborates on eyetracking research to enhance flight safety