The video and audio is at https://www.bbc.co.uk/news/av/uk-45517388/skripal-novichok-poisoning-rt-editor-hangs-up-on-newsnight
Obviously, Margarita Simonyan hit a wall beyond which she would be forced to tell the truth. RT is a propaganda arm of the Russian government.
The journalist who interviewed the two Russians suspected of the Salisbury Novichok attack hung up on a BBC presenter after “the manner of the interview” was challenged.
In the interview on the state-run RT channel, the pair said they had travelled to Salisbury on the recommendation of friends.
Downing Street described these claims as “lies and blatant fabrications”.
When questioned by Kirsty Wark about whether RT was a propaganda tool for the Russian State, Ms Simonyan said: “Your question to me seems like typical Western propaganda.”
Shortly afterwards, she hung up.