A policeman helped jail a knife-wielding robber with the aid of his impressive memory.

Sutton-based officer PC Heath Keogh was looking through some intelligence reports when he spotted one which included a picture of a man suspected of committing two robberies in Brixton Road, Lambeth, in August.

PC Keogh recognised the man in the picture as Zephon Goodman having come across the 27-year-old while working in Lambeth previously.

Goodman, most recently of a hostel in York Road, Sutton, was arrested and pleaded guilty to two counts of robbery and was jailed for six years at Inner London Crown Court on Thursday, December 6.

In the first robbery Goodman pulled a knife on a 26-year-old man and stole his iPhone shortly after 2am on Wednesday, August 8. He then led his victim to a cashpoint and demanded he withdraw money but he had insufficient funds. Goodman then left and exchanged the phone for cocaine.

The second robbery happened less than three hours later. Goodman had been loitering in Brixton Road when he held the same knife to a 24-year-old man making a withdrawal from a cashpoint. Goodman took £20 from the victim.

Goodman told police he had been on a week-long drug binge at the time.