He also spent some years as a film maker, producing videos for activist organisations, including the Green Party, Object, and NO2ID.[7] He wrote and directed a number of short films[8] and a pilot episode of a comedy series called 'Be Well', based in a therapy clinic.[9]
Janson joined the YPG after spending time working in Mosul, distributing medical aid and clean water. What he saw there moved him to take the next step and travel to Syria to join the Kurds to defend Rojava against ISIS.[2] He fought in the liberation of Raqqa, then in January 2017, when Turkey invaded the Kurdish town of Afrin, just over the Syrian border, Janson decided to stay with the YPG to fight this new threat, despite knowing that fighting a NATO ally could cause problems if he wanted to return to Europe.[2]
Janson appeared in YPG propaganda videos, including one condemning what he perceived as Western inaction during the Turkish-led Afrin offensive of 2018.[10] He was interviewed for several print articles and by the BBC.[2][11] Interviews with him also feature in the BBC documentary "Anna, the woman who went to fight ISIS",[12] about the British YPJ fighter, Anna Campbell who died in the Afrin assault.
Upon his return to Britain in 2018, Janson was arrested in Kent under section 5 of the Terrorism Act.[13] He was still under investigation at the time of his death sixteen months later,[14] although no former YPG volunteers have been successfully prosecuted by the British government.[15]
Janson died on 4 September 2019, taking his own life after a long struggle with mental illness.[14][5] He was buried in the grounds of Dunrobin Castle, Golspie, Scotland, the seat of the Earls of Sutherland.