They are based all over the world. The people I spoke to while making our series The Moderators for Radio 4 and BBC Sounds mostly lived in East Africa and had since left the industry.

Their stories were heartbreaking. Some of what we recorded was too brutal to broadcast. Sometimes my producer Tom Woolfenden and I would finish a recording and sit in silence.

“If you pick up your phone and then go to TikTok, you’ll see a lot of activity, dancing, you know, happy things,” says Mojez, a former Nairobi-based moderator who worked on TikTok content. “But in the background, I was personally moderating hundreds of horrifying and traumatic videos.

“I took it upon myself. Let’s let my sanity take over so that general users can continue to go about their business on the platform.

There are currently numerous legal claims pending that the work destroyed the mental health of these moderators. Some former East African workers have banded together to form a union.

“Realistically, the only thing stopping me from logging on to a social media platform and witnessing a beheading is someone sitting in an office somewhere, watching this content for me and reviewing it for so I don’t have to do it,” says Martha Dark. who runs Foxglove, a campaign group supporting the legal action.