Is there any chance that CM is related to Mae Marten ? She is an aristo too. Not good at researching family trees but tattlers can usually be relied on get the info.
Mae left the UK and is now based in the US. I found it strange that they didn't come back to film Taskmaster Champion of champions and left UK, just as there star was rising after winning series 15.
Probably a huge stretch but I wondered if it may be because of this case.