The threads are here to be found from years ago. The inquiry results make interesting reading and the wording is important: not that the person involved did not understand safeguarding, but that the inquiry personal found that they were not capable of understanding. It was not lack of information or training, it was a capacity issue. This sort of thing is not lightly stated in a report.
I have never yet seen any statement or investigation generally into those who deliver advice, training and leadership to groups such as the NHS, Guides, local political groups, on behalf of LGBT umbrella organisations, whether those delivering that training hold safeguarding qualifications even to the most basic standard that anyone employed even to the level of a lunchtime supervisor would be required to hold. Never mind to the level of management qualified to guide policy and make recommendations - which requires a thorough understanding of safeguarding practice and the needs and requirements and law surrounding all protected characteristics. Not just one.
There has been a tremendous failure in the most basic due diligence by those commissioning this training. A terrifying failure to think in a rush to be enthusiastically nice.