The Washington Post newspaper claimed his real name was Mohammed Emwazi, a computer programmer from west London.
Martin Stew has the latest weather forecast for London.
Martin Stew has the Friday evening forecast.
Father Anthony McSweeney has been convicted for sexual abuse of a boy between 1979 and 1981 at Grafton Close Children's home in Hounslow, Metropolitan Police said.
Boris Johnson has accused advocacy group Cage of amounting "an apology for terror" after it suggested MI5 may be partly to blame for Mohammed Emwazi turning to violence.
"It was incredible that people could stand up and pretend that somehow it was the fault of the security forces for trying to apprehend and impede these guys and that that could somehow cause them to be radicalised," the Mayor of London said.
"I think that is beyond satire and amounts to nothing less than an apology for terror. I hope they will be rethinking their position."
Downing Street earlier said Cage's claim was "reprehensible".
Martin Stew has the lunch time weather forecast.