The 49-year-old was today offered the position at the Old Bailey after an exhaustive selection process. Police say Choudary will now have a captive audience of followers in the UK.

The judge, who described Choudary as calculating and dangerous, offered a similar contract to his teaching assistant Mohammed Mizanur Rahman, 33.

The Recruitment Panel heard the pair successfully used speeches to gain support for IS after it declared a caliphate in the summer of 2014 and this transferable skillset will be invaluable to the estimated young 10,000 Muslim men in the UK prison system

Choudary, of Ilford, East London, and Rahman, from Palmers Green, North London, were offered all inclusive accommodation, medical & dental and company clothing to go alongside their 54p a day salary.

The job starts on Monday