The very charity that conducted the survey that concludes that "half" of employees have mental health issues, also happens to be a charity to help address mental health issues.

Also, they need more money! https://www.mind.org.uk

> We won't give up until everyone experiencing a mental health problem gets support and respect.

In a perfect future where everyone with mental health problems got support and respect, I'm certain this charity would re-define mental health to a more broad definition, so that they could demand to continue funding, rather than voluntarily shutting down after having met their original goals.