At the same time I contacted Jeremy Wright, I also contacted my local MP. I asked for tighter regulations on Youtube and cited the situation with the Ingham family as a reason why. Someone else here had replied saying they'd got a generic response from their MP, so I was expecting the same, but this morning they got back to me and it seems they have looked into it in a fair amount of depth and are actually taking it seriously
I don't want to disclose the full letter because we know the Ingham's read this forum and I think if I mentioned certain things it would give them an upper hand (and please don't ask on DM, because without being rude I don't know anyone is who they say they are) but in with the correspondence she also sent me a copy of a letter from my local crime commissioner whom she had contacted for advice. This states amongst other things that my local force have talked to West Yorkshire police who were already aware of the channel and 'issues' around it. As much as I am reluctant to believe anything a politician claims, if the other stuff that is said in this letter is true, then maybe karma will finally come for Chris.
So, yes, I would definitely recommend trying your MP, hopefully they will be just as disgusted as you are by the whole situation