text: The Right Reverend Rachel Treweek, 53, has taken over from The Right Reverend Michael Perham after his retirement.
  Two women bishops have already been appointed, but Bishop Treweek is the first woman to run a diocese.
  At a service in Gloucester Cathedral she was presented with her pastoral staff and placed in her bishop's chair.
  She also preached her first sermon as a bishop.
  During the service, she was welcomed by the Dean of Gloucester, the Very Revd Stephen Lake.
target: The most senior woman bishop in the Church of England has formally begun her new role as the Bishop of Gloucester.