Marianna Spring returns to her investigation into conspiracy theories about UK terror attack victims, and reports on moves to hold those responsible for spreading them to account.

Disaster Trolls revealed how people caught up in the Manchester Arena bombing suffered years of online abuse and threats as a result of false claims that they were “crisis actors” who faked the attack.

In this new episode, Marianna discovers what has changed for some of the people who featured in the original series.

She also reports on developments in efforts to hold to account those who spread extreme conspiracy theories, and asks questions about how to tackle harmful disinformation while protecting freedom of expression at the same time.

This episode contains graphic descriptions of violence.

Presenter: Marianna Spring