The latest plea to free the former taxi driver from Manchester who travelled to the region as an aid worker last year is made by a judge on the Sharia council in London, a director of Prophetic Guidance and an Imam.It comes after more than a hundred representatives from Britain's Muslim community signed a letter urging Isis to release the 47-year-old who appeared at the end of a video last Saturday in which fellow captive David Haines was killed.In a YouTube video Judge Shaykh Haitham Al Haddad said: 'This is to confirm that executing this man is ... impermissible, prohibited according to Sharia.'Ustadh Abu Eesa, a director of Prophetic Guidance, is based in Manchester and said he would 'personally vouch for' Mr Henning, adding that his would-be killers are defacing the religion of Islam.Imam Shakeel Begg, of Lewisham Islamic Centre quotes from the Koran, explained that there is 'no justification in our religion that allows you to continue to hold him let alone harm him'.Footage earlier this week showed Mr Henning with other aid workers on the Greece-Turkey border in December last year saying the dangerous journey to Syria is 'worthwhile' to help those in need.On Thursday a video of British photojournalist John Cantlie was released, showing the hostage reading from a prepared script, saying he would talk about the self-proclaimed IS movement.Unlike previous Isis videos there was no threat made on camera to Mr Cantlie's life. Meanwhile, Turkish Prime Minister Ahmet Davutoglu said today that 49 hostages who were seized by Islamic militants in Iraq have been freed and safely returned to Turkey.The announcement brings to an end Turkey's most serious hostage crisis.The hostages were kidnapped from the Turkish Consulate in Mosul, Iraq on June 11, when the Islamic State group overran the city in its surge to seize large swaths of Iraq and Syria.Their release contrasts with the recent beheadings of two U.S. journalists and a British aid worker by the Islamic State group.(dailymail.co.uk)Bakudaily.Az