A robber who went up to an Ipswich man as he pulled up outside his home and threatened to stab him if he didn’t get out of his car has been jailed for 21 months.

Patrick Butler grabbed the keys to the Audi A3 from its driver and got into the car and tried to start it before giving up and throwing the keys down in the street, Ipswich Crown Court was told.

Butler then ran down Hawthorn Drive trying to get into moving cars, said Isobel Ascherson, prosecuting.

When police tried to arrest 22-year-old Butler he tried to butt the police car with his head and threatened to spit at a policewoman and to “bite her face off”. Butler, of London, admitted robbery, criminal damage to a police car and common assault by spitting at a police officer.

The offences took place on March 15.

John Morgans, for Butler, said his client had been drinking every day after arguing with his girlfriend and being kicked out by his mother.