Thank you for submitting a question to the Community Toolbox!
We appreciate you sharing this story with us and reaching out for support. Based on what we know from our experiences in the U.S., it may benefit your group to identify an investigative journalist in the UK to follow-up on what has happened. Some public awareness from a trusted journalist might motivate community action. You should also consider making multiple requests to investigative authorities (police). After that, other options may be to organize coalition efforts to amplify awareness of the issue. We cannot suggest what would be legal within the bounds of UK law, but we can suggest ways to motivate your community into action through the toolbox activities.
There may be some helpful resources here: /en/not-enough-action