Fellow Briton Shaun Pinner was additionally captured in the course of the siege.
Mr Aslin’s mom, Angela, and his brother, Nathan, stated he had appealed to Mr Johnson for his freedom throughout a cellphone name with them.
Last week, Conservative MP for Newark Robert Jenrick stated a prisoner swap was the probably path to get Mr Aslin to security whereas Mr Johnson stated he hoped that Mr Aslin is “treated with care and compassion” by his captors.
Nathan stated he spoke to his brother on the cellphone following the feedback, and stated he hoped there could be a swap quickly.
He informed TalkTv: “I would hope that, at some point, there will be a prisoner swap. However, it’s out of my hands. It is between Ukraine and Russia.”
Outlining his cellphone dialog along with his brother, Nathan added: “It was obvious that he was with the Russian people that were holding him and he was asking for me to contact Boris to get this prison swap done. And to keep on asking for this swap.”
Asked what he would say to the Prime Minister, Nathan stated: “Act now when you got the time to act. You’ve got two British citizens on the line, being forced to say whatever the Russians are putting in (their) mouths at gunpoint, whether they show it on the camera or not. And it’s a moral obligation to do something about it.”
Angela added: “I would like to hope that Boris will help. And talk to the Ukraine Government, (and) embassy. There can be something sorted out so that these two guys can come home.”
Russian Federation ministry of overseas affairs spokeswoman Maria Zakharova beforehand stated the British captives have been being given “food and drink, as well as any other assistance they may need” throughout their detention.
The Government has been contacted for remark.