LONDON (AFP) - A British man who murdered his wife after becoming enraged when she changed her relationship status on Facebook to "single" was jailed for at least 18 years late Thursday.ADVERTISEMENTEdward Richardson, 41, stabbed wife Sarah, 26, to death in a "frenzied and brutal" attack at her parents' home in Biddulph, central England, last May after she altered her profile on the Internet social networking site.The couple had been living apart since the previous month, said Fiona Cortese, a spokeswoman for the Crown Prosecution Service, which is responsible for prosecuting cases in England and Wales."Richardson became enraged when Sarah changed her marital status on Facebook to single and decided to go and see her as she was not responding to his (text) messages," Cortese said."He gained entry by breaking the front door window and made his way into the property."Once inside, he found Sarah in her bedroom and subjected her to a frenzied and brutal attack with a knife and then attempted to take his own life."