What real life matter did Lucy Prebble's play, "A Very Expensive Poison" (2019), deal with?

Question

Which 2014 play by American playwright and journalist Katori Hall deals with the ecstatic visions of Rwandan schoolgirls in 1981?

Answer 1

The murder in the UK of Alexander Litvinenko
Litvinenko was killed in London in 2006, with acute radiation from polonium. Russian agents were accused of carrying it out; Russia has consistently denied any part in the killing. Prebble's play is based on a book by Luke Harding.