British combatants in Ukraine share frontline footage with BBC Newsnight.

There's no denying that Russia's invasion of Ukraine nearly a year ago elicited strong reactions in this country. But how many Britons felt strongly enough to fight there?

Thousands of foreign volunteers, including a British contingent, are fighting for Ukraine.

Since last February, eight British fighters and aid workers have been killed, and many more have been seriously injured.

Emma Vardy of the BBC's Newsnight has been granted exclusive access to a unit that has spent months filming their experiences on the frontlines, as well as family members back in the UK.