Moment yob wielding huge blade is pinned to floor and knifed in broad daylight park attack

THIS is the shocking moment a yob wielding a huge blade is pinned down and knifed in a broad daylight attack. Cops have arrested four teenagers after the horror unfolded at Burgess Park in Camberwell, South East London, yesterday. Shocked bystanders - seen watching on from behind a temporary metal fence - can be heard...