Gavin Grey: UK correspondent on the investigation into Great Ormond Street Hospital - Heather du Plessis-Allan Drive

Great Ormond Street Hospital in London has launched an urgent review of 721 cases that were treated by a former surgeon.

The hospital has revealed multiple children had come to severe harm under the care of Yaser Jabbar, a consultant orthopaedic surgeon.

UK correspondent Gavin Grey says it's alleged Jabbar conducted inappropriate procedures on these children - causing permanent damage in some. 

LISTEN ABOVE

See omnystudio.com/listener for privacy information.