London (CNN)John Cantlie, a British journalist who was taken hostage in Syria in 2012 and appeared in a number of ISIS propaganda videos during his time in captivity, is believed to be alive, UK Security Minister Ben Wallace said Tuesday. Wallace told a briefing in London for international reporters, attended by CNN, that the British government believes Cantlie is still being held by ISIS. Cantlie, an experienced war photographer, was covering the Syrian conflict when he was abducted alongside American journalist James Foley, who was later beheaded by ISIS. Asked generally about British hostages around the world, Wallace said the UK does not pay ransom and discourages other countries from doing so. Wallace named Cantlie as the most public and prominent British hostage, and when asked directly if the belief is Cantlie is still alive, he said yes. Wallace would not elaborate or say whether Cantlie is thought to be in the rapidly-diminishing area still held by ISIS. Since his capture, Cantlie has appeared in ISIS videos dressed as a prisoner in an orange jumpsuit, and filmed in the style of roving foreign correspondent reporting from the streets of the so-called caliphate. Cantlie was last seen in a propaganda video released by ISIS in mid-December 2016, purportedly on the "frontline" of the fight for Mosul. In it, he says: "We're in the center of Mosul a little way east, and behind me it looks like a scene out of a Steven Spielberg film, except this is for real."