Two British fighters captured in Ukraine by Russian forces appeared on Russian state TV on Monday and asked to be exchanged for a pro-Russian politician who is being held by the Ukrainian authorities.

It was unclear how freely the two men - Shaun Pinner and Aiden Aslin - were able to talk. Both spoke after being prompted by an unidentified man.

Both asked British Prime Minister Boris Johnson to help bring them home in exchange for Ukraine releasing pro-Russian politician Viktor Medvedchuk.