"Svitlana says she never considered betraying her country, 'not for a second.'

'My husband would've never forgiven me,' she says, as we meet in her flat near Kyiv.

The 42-year-old had been waiting for news of her husband Dima, an army medic captured by Russia, for more than two years when she suddenly received a phone call.

The voice at the end of the phone told her that if she committed treason against Ukraine, Dima could be eligible for better treatment in prison, or even early release.

'A Ukrainian number called me. I picked up, and the man introduced himself as Dmitry,' Svitlana explains. 'He spoke in a Russian accent.'

'He said, "You can either burn down a military enlistment office, set fire to a military vehicle or sabotage a Ukrainian Railways electrical box."'

There was one other option: to reveal the locations of nearby air defence units — vital military assets that keep Ukraine's skies safe from Russian drones and missiles.