Baron's son 'punched police officer despite being restrained, pepper sprayed twice and hit with baton after he tried to arrest him for attacking his BBC presenter wife' Charles Gibson, 45, 'fought with wife Tanya Beckett about their divorce' PC Aaron Walker arrived and him and Gibson 'grappled for 11 minutes' Gibson, the son of Baron Ashbourne, denies any wrongdoing Claims: Charles Gibson, the son of a peer, is alleged to have fought with PC Aaron Walker who tried to arrest him The son of an aristocrat fought with a policeman who tried to arrest him for assaulting his BBC presenter wife, a court heard. The Hon. Edward Charles d'Olier Gibson appeared at Oxford Magistrates' Court yesterday to face charges of assaulting his wife Tanya Beckett, a presenter on BBC World News. He's also accused of punching PC Aaron Walker and resisting arrest despite being sprayed with pepper spray twice and hit with a baton Gibson is the son and heir of Edward Barry Greynville Gibson, fourth Baron Ashbourne. The 45-year-old former financier, now a business journalist, denies both charges. PC Walker said he was called to the couple's home in the village of Lewknor, Oxfordshire, in the early hours of June 8. Ms Beckett said that her husband had threatened her and pulled her hair while they were discussing the possibility of divorcing, according to the officer. He added that the couple had been drinking heavily, and one of Gibson's shotguns could not be found, prompting a search of the grounds. The defendant's car pulled in to the driveway around 2.30am, PC Walker said, but Gibson allegedly ignored the officer's order not to move which led to them 'grappling' for 11 minutes. PC Walker said he tried to restrain the defendant and handcuffed one of his hands, but Gibson threw him off - 'which, considering I weigh 13 and a half stone, was quite impressive'. The officer continued: 'At some point, he has taken a swing at me, which I moved to avoid. He said to me, "You're not arresting me, I'm going home." 'I then reached for my capacitor [i.e. pepper spray] and sprayed it directly into Mr Gibson's eyes. He stood there, wiped it from his eyes and called me a coward. At this point in my career, that is the first time I have ever had a capacitor fail on me. Strength: Gibson, pictured with his wife at a Mayfair party in 2006, carried on fighting while handcuffed and simply wiped pepper spray out of his eyes The officer said he then drew his baton and hit Gibson three times on his shins as hard as he could, which also had no effect. He said: 'This was an "Oh no" moment on my part, because I have never come across a person I have not been able to physically overpower.' PC Walker told the court that when he grabbed Gibson once more, the aristocrat punched in the side, saying he was 'nobody' and did not have the power to arrest someone like him. When armed support officers arrived they were able to take Gibson into custody, the policeman added. Wife: Gibson is accused of assaulting BBC World News presenter Tanya Beckett, whom he married in 2001 Presenter: Gibson, pictured top left with colleagues at the launch of LBC radio in 2003, is a broadcaster Edmund Gritt, defending, suggested to PC Walker that his client had been misquoted and said the officer had failed to identify himself, which he denied. The trial has been adjourned until November 11. Gibson is the descendant of an Irish aristocratic family - his great-great-grandfather, the first Baron Ashbourne, was Lord Chancellor of Ireland under Benjamin Disraeli. He trained as a chemist before become a mining analyst at the stockbroker Cazenove, then left the City to take up journalism and now presents programmes for LBC radio. Ms Beckett, 47, who married Gibson in 2001 and has three children with him, is also a business journalist, frequently appearing on BBC World News and other BBC channels.