Anthony Joshua gives celebrities a boxing lesson on Graham Norton's BBC show... before stepping up to smash punching bag record himself

• Anthony Joshua was a guest on The Graham Norton Show on Friday evening
• He gave fellow celebrities a boxing lesson, showing them how to punch a bag
• Joshua then stepped up himself to smash the record, much to audience's delight
• Brit has been out of the ring since his impressive win over Wladimir Klitschko