I think the Safety Recommendation 2021-027 stands out and I believe that PinS approaches should be widely developed and be available for civil onshore helicopter operations. Planning and flying IFR en-route and provides a black & white 'visual, landing' or 'go around' decision at the end of an instrument procedure, which offers easier decision making than scud running and saying "I'm just going to try one more mile" (in my opinion).
I believe that knowing that the flight would be IMC and planning to use a PinS approach at the end also makes the possibility of not reaching the destination due to weather much more difficult to ignore and necessitates a back-up IFR diversion, which in this case seemed to have been ignored as the possibility of IIMC was not considered and Wellesbourne was discussed as the diversion (Birmingham was only brought up by the crew as a diversion once they had already gone IIMC).