The former leader of far-right group Britain First has been jailed for eight weeks for breaching a court order not to enter a mosque or encourage others to do so.
Paul Golding, who stood for London Mayor earlier this year, was found guilty of visting a mosque in Cardiff, thereby breaching a High Court injunction imposed on August 11.
In bringing the case against Golding, Bedfordshire police said the 34-year-old and his fellow activists filmed themselves carrying out a "mosque invasion" at the Cardiff place of worship on August 20.
The video, posted on Facebook, shows three Britain First activists enter the Al-Manar Islamic Centre in Cardiff and interrogate members of the alleged radical links of Imam Ali Hammuda.
Golding was actually served with a High Court summons during the trial of his former deputy, Jayda Fransen, who was subsequently convicted of religious harassment.
Although Golding stepped down from his role as leader of Britain First last month, citing "serious family concerns", the conviction of him and Fransen is a double blow for the right-wing party, which has gained notoriety for its mosque invasions and aggressive messages regarding Islam.
The group gained considerable traction on social media in 2014, although many claimed it was using underhand tactics to attract Facebook followers. Since then it has faced a substantial backlash, with one MP, Labour's Louise Haigh, suggesting the group should be proscribed as a terrorist organisation.
Golding gained just 32,000 votes in the London Mayoral elections this year, and caused further notoriety by turning his back on winner Sadiq Khan.