Newark MP Robert Jenrick says the treatment of his constituent after he was captured by Russian forces is a "flagrant breach of the Geneva Convention". Aiden Aslin, 28, was captured while fighting for the Ukrainian armed forces and has appeared in a YouTube video calling for his freedom while under duress.
Footage on Russian state TV shows him being led around in handcuffs with a cut on his forehead, having been captured. In the video, which remains on YouTube, Mr Aslin and another captured Brit, Shaun Pinner, can be seen asking for an exchange for their safe return.
The exchange concerns pro-Russian Ukrainian politician Viktor Medvedchuk, who is also in captivity. In the YouTube video Mr Aslin, from Newark, says: "If Boris Johnson really does care like he says he does about British citizens, then he would help pressure Zelensky to do the right thing and return Viktor to his family and return us to our families."