Firth, who joined the channel in 2009, told BuzzFeed that she decided to resign from the Kremlin-funded news channel because she felt it was "disrespectfully" attempting to pin the blame for Thursday's Malaysia Airlines disaster on the Ukrainian government.

"When this story broke I ran back into the newsroom and saw how we were covering it already and I just knew I had to go," she said.

"It was the total disregard to the facts. We threw up eyewitness accounts from someone on the ground openly accusing the Ukrainian government [of involvement in the disaster], and a correspondent in the studio pulled up a plane crash before that the Ukrainian government had been involved in and said it was 'worth mentioning'.

"It's not worth mentioning. It's Russia Today all over, it's flirting with that border of overtly lying. You're not telling a lie, you're just bringing something up. I didn't want to watch a story like that, where people have lost loved ones and we're handling it like that.

"I couldn't do it any more. Every single day we're lying and finding sexier ways to do it."