I don't doubt your explanation of the legal process. "Contempt" is one of those things, like "breach of the peace" which they use how they like. The process is not applied fairly across the board. I've witnessed this time and again. The British establishment are very clever at rationalising their bias with words.
If you think there isn't a cover up, you might think about interviewing this fellow: https://hooktube.com/watch?v=UCdJjTDoAT0
However the deeper story is who is behind Robinson. His role is perception management, attempting to ensure the ire of the white working class is focused on one group and not another and the establishment are certainly in on it.