Thug becomes the first person in Britain jailed for 'revenge porn' after posting intimate picture of his ex-girlfriend on WhatsApp Luke King was sent naked photos by victim during three-year relationship She became concerned when he threatened to post images after it ended He changed profile picture on internet messaging service to explicit photo Comes weeks after Government promised crackdown on 'revenge porn' A 21-year-old man has become the first person in Britain to be jailed for 'revenge porn' after he posted a naked picture of his ex-girlfriend on WhatsApp. Luke King was sent a number of intimate photographs by the victim during an on-off relationship that lasted three years. The woman, who has not been named for legal reasons, became concerned when King threatened to post the explicit images online after she broke up with him. Jailed: Luke King was sent a number of intimate photographs by the victim during an on-off relationship that lasted three years. He uploaded one of them to online messaging service WhatsApp in August In August he posted one of the photos, along with 'abusive offensive remarks', as his profile picture on online messaging service WhatsApp. King, from Nottingham, was jailed for 12 weeks at Southern Derbyshire Magistrates Court today. District Judge Andrew Davison told King that he should be 'thoroughly ashamed' of himself for what he called a 'despicable and significant breach of trust'. He said: "For some reason she sent them to you in complete confidence. Clearly it was an unwise thing for the complainant to do. 'Nevertheless it doesn't give you any excuse whatsoever to post this type of intimate photograph together with the abusive and offensive remarks you posted.' King was also slapped with a restraining order which bans him from contacting the woman for two years - including over the internet. King was also given a restraining order which bans him from contacting the woman for two years - including over the internet The sentence comes weeks after the Government published tough new guidelines on the crime. King pleaded guilty to posting an explicit image on the internet in a course of conduct which amounted to harassment of the woman. He also admitted failing to answer police bail on September 5. The court heard the victim, who lives in Derby, told police: 'It has disgusted me and really upset me.' Prosecutor Alison Wright added: 'She called Derbyshire police to report that he had threatened to put explicit photographs of her on the internet. She accepted she sent them initially to him but they were for his eyes only, so to speak. The court heard that King had been abusive to the woman earlier in the relationship and she had reported him to Nottinghamshire Police. James Close, defending, said: 'He accepts it was a totally unacceptable thing to do. In his words 'something exploded' in him. He said it was a stupid, angry reaction. He told the probation service he was not sexually motivated and it was not through jealousy. It has had an impact on the young lady and I accept that. The jail sentence comes just weeks after Justice Secretary Chris Grayling vowed to clamp down on 'revenge porn'. He announced a new criminal offence of posting the explicit images online with carry a maximum jail term of two years. The Crown Prosecution Service branded the offence a 'nasty and invasive crime' and the plan has been welcomed by campaigners. According to the bill, which is currently going through Parliament, the distribution of 'revenge porn' will be made a specific criminal offence in an amendment to the Criminal Justice and Courts Bill. Mr Grayling said: 'The fact that there are individuals who are cruelly distributing intimate pictures of their former partners without their consent is almost beyond belief. We want those who fall victim to this type of disgusting behaviour to know that we are on their side and will do everything we can to bring offenders to justice. That is why we will change the law and make it absolutely clear to those who act in this way that they could face prison.