British Reporter John Cantlie in New Islamic State Hostage Video

Isis (now known as the Islamic State) has released a haunting video that shows John Cantlie, a British hostage and former war reporter for a number of British newspapers, pledging to expose the "truth behind the Islamic State".

"Over the next few programmes, I am going to show you the truth as the Western media tries to drag the public back to the abyss of another war with the Islamic State," he says.

The former reporter for The Sunday Times, The Sun and The Sunday Telegraph speaks in an orange jumpsuit behind a table in the video entitled Lend Me Your Ears.

Cantlie, believed to be 43, says how he will broadcast a series of videos that will aim to reveal the "manipulated truths" used by the Western media.

"Now, I know what you're thinking. You're thinking: 'He's only doing this because he's a prisoner, he's got a gun at his head and he's being forced to do this,' right?

"Well, it's true. I am a prisoner, that I cannot deny. But seeing as I've been abandoned by my government and my fate now lies in the hands of the Islamic State I have nothing to lose.

"Over the next few programmes I'm going to show you the truth as the Western media tries to drag the public back to the abyss of another war with the Islamic State," he continues.

"After two disastrous and hugely unpopular wars in Afghanistan and Iraq why is it that our governments appear so keen to get involved in yet another unwinnable conflict?"