Russia’s UK ambassador calls footage a “fabrication”. In a tense BBC News interview, Andrei Kelin claims allegations of war crimes in the town of Bucha are false despite physical evidence, satellite imagery and eyewitness accounts. Meanwhile, Ukraine’s chief prosecutor tells us she’s investigating thousands of cases. This episode of Ukrainecast was made by Daniel Wittenberg with Chris Flynn and Clare Williamson. The technical producer was Emma Crowe. The editor is Jonathan Aspinwall. Email Ukrainecast@bbc.co.uk with your questions and comments. You can also send us a message or voice note via WhatsApp to +44 0330 1234 220.