London attacks: Islamic scholar reported Khuram Butt to police last year

Name: London attacks: Islamic scholar reported Khuram Butt to police last year
Uploaded: 2017-06-06T22:20:58.000Z
Duration: 2 min 22 s
Description: Dr Usama Hasan describes a confrontation with the London attacker Khuram Butt at an event last year.

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Dr Usama Hasan describes how he was involved in a confrontation with Khuram Butt, one of the three London attackers at an event last year to mark Eid, the end of Ramadan.

Our special correspondent Ed Thomas has been investigating what the authorities knew about Khuram Butt.

6 June 2017