I’m fairly new to this forum and have read your heartbreaking story and signed the petition. Hard to believe that while most of us were troubled about the mundane stuff surrounding dance training, you were going through this terrible trauma.
My advice would be to write to members of the House of Lords. I’m thinking particularly about Lord Saatchi as a starter. He managed to change the laws regarding medical research of cancer after his wife died of breast cancer, he felt, unnecessarily. He put up a huge fight against fierce opposition but was successful in the end. Like you. he was determined that his wife’s death should not be in vain. He had his story in all the major newspapers - Times, Telegraph etc. Easy for him, I guess, when he’s surrounded by people in publicity. But if you can find someone who has similar passion and determination for change to take on your story and support you then I’m sure you will be successful. Happy to write too if you need additional back up.
Good Luck.