A man who threatened a woman with a knife as he tried to steal her mobile phone has been jailed for four years.

Nathan Penwell, 32, of no fixed address, approached the woman on Harehills Road in Harehills, Leeds, on the evening of 27 April.

Police said when she refused to hand over her phone, Penwell pushed her to the ground and had to be restrained by members of the public who intervened.

He admitted robbery, possession of a knife in a public place and assault of an emergency worker and was jailed at Leeds Crown Court on Thursday.