3 The facts of the case are conveniently summarised in a statement of material facts . At about 4.45pm on 30 October 1999 (a Saturday afternoon), police attended at a house in Becker Court, South Hedland in response to a complaint. Whilst speaking there to a woman resident, the appellant came to the side fence of the house and began yelling verbal insults at the police. When told that he was under arrest for use of insulting words, the appellant walked through his front gate onto the front verge of the house where the police were present. He punched one of the police officers to the right side of the face with a clenched fist, causing the officer to stagger backwards. He was then subdued but in the course of this he swung violently with both fists and legs until pinned down on the road verge, where he continued to struggle. Some minutes later he became calm and stated that he would go to the back of the police van, but when released by police he again became aggressive and another struggle occurred, causing the police to pin him to the ground again and call for police backup. When that arrived he was handcuffed, put in the police van and conveyed to the South Hedland police station where he was charged. The officer who was struck in the jaw was Sergeant Ward, who received a swollen jaw with cuts inside his cheeks. He also received grazes to the forearm and knee, they in all probability being due to the struggle on the ground. Medical attention was required for Sergeant Ward. The testimony of Sergeant Ward and Police Constable Barbara Mulder was entirely consistent with this statement of facts. Constable Mulder added that when the appellant had been let up by Sergeant Ward, he "shouldered her" to her left shoulder as he walked past, pushing her a little off balance. Constable Mulder described the appellant's demeanour as being "he looked angry. He looked tense and ready to fight". The insulting words which had been directed by the appellant at Sergeant Ward were described as "Mark Ward, you're a fucking wanker".