Iranian refugee Amir Nowrowzi, 30, smashed a metal chair over nurse Margaret Nelson’s head and then shouted racist abuse at an Asian receptionist.

He was arrested at the time of the incident but released without charge.

Mrs Nelson, 58, suffered a cut near her eye and bruising to her arm and was left severely shaken by the unprovoked attack in July last year.

District Judge Roy Anderson, sitting at Leeds Magistrates Court, jailed Nowrowzi for five months.

The private prosecution was launched by the NHS Security Management Service.