The boss of Lukoil, a Russian oil company, died on Thursday, the latest in a string of deaths of key Russian business people. Vitaly and Victoria unpick the rumours with Russian expert and author Mark Galeotti.

We get the latest on the inspection of the Zaporizhzhia nuclear plant with James Waterhouse.

And Maria Korenyuk has been investigating the re-writing of history books for schools in Russian occupied areas of Ukraine. The series producer is Estelle Doyle. The producers are Clare Williamson and Arsenii Sokolov. The technical producer is Emma Crowe and the editor Jonathan Aspinwall. Email Ukrainecast@bbc.co.uk with your questions and comments. You can also send us a message or voice note via WhatsApp, Signal or Telegram to +44 330 1239480.

The mysterious death of the Russian oil boss