https://www.bbc.co.uk/news/world-europe-60749064

Russian state TV's Channel One plays a crucial part in the Kremlin's media messaging. It is Russia's second most popular channel, and its flagship news programme Vremya (Time) is watched by millions.

Normally, there is no room for deviation from the party line.

So when Marina Ovsyannikova ran on to the set behind the news anchor in prime time, brandishing a poster saying "Stop the War!", it was an unprecedented moment of dissent against the Kremlin which reached into living rooms across the country.

Ms Ovsyannikova, who has a Ukrainian father and Russian mother, has been fined 30,000 roubles (£214, $280) for an anti-war video she had also released.

Her protest is extraordinary in more ways than one.

To start with, Channel One viewers are not even used to hearing the word "war" used to describe Russia's invasion of Ukraine. The government has ordered the media to call it a "special military operation" launched to "demilitarise and denazify" Ukraine.

Ms Ovsyannikova's protest also targeted the core President Putin supporters: most Russians still use state TV as their main source of news, rather than from reports in the diminishing number of independent websites or from social media.