Description A convicted sex offender who got mixed up over how long he had to register his address with the police has been sent back to prison just days after he was last released from jail. Oxford man Wilfred Mosira, 37, left HMP Bullingdon, near Bicester, on June 23. As a registered sex offender, he was under a duty to tell the police of his new address within three days of moving. But Oxford Magistrates Court heard on Thursday (June 29) that Mosira mistakenly believed that meant three working days and not three calendar days. Having been released on a Friday, he thought he had until the following Wednesday three working days to register at the police station, his advocate Charlie Moss said. He did not. On Tuesday (June 27), the police were called after Mosira argued with a member of staff at a Co-op in Abingdon when his bank card was declined. Prosecutor Liz Tweed said the defendant 'pushed' the store assistant. He was found outside the shop, arrested and held in custody until he appeared before the court on Thursday afternoon. Mosira, of Owens Way, Cowley, pleaded guilty to breach of sex offender notification requirements and common assault. The magistrates jailed him for four weeks, with chairman of the bench Jon Kearsey noting that he had been given a months imprisonment earlier this year when he was before the court for the same offence. He was also ordered to pay 50 in compensation.