British Prime Minister David Cameron's 81-year-old mother has lost her job after a children's centre closed as Government disciplines its expenditure. Mary Cameron and her sister Clare Currie had last month signed a petition protesting against the Cameron-led government's plans to close 44 children's centres in Oxfordshire, including some in the Prime Minister's own constituency of Witney. Mary, a retired magistrate, said she was "very sad" after West Berkshire Council confirmed it would shut the Chieveley and Area Children's Centre - where she works as a volunteer - on March 24 as part of its 300,000- pound cost saving measures. "The closure of the children's centre where Mary worked is a bitter blow in her battle to stop her heartless son's Tory cronies axing the vital free services," The Mirror reported. "I am very sad that it is being closed down but if there's not enough money to pay for it things have to go," she was quoted as saying.