Via the BBC:

Barbara Janke said she would stand down as council leader and as leader of the Liberal Democrat group.

Ms Janke announced her decision to the Lib Dem-controlled authority’s cabinet earlier. She said she made the decision as she approached her 65th birthday.

She said it had been an “enormous privilege” to serve as council leader in 2003-2004, 2005-2007 and from 2009 to the present.

She will remain leader of the Lib Dem group until the group’s annual meeting on 8 May, when a new leader will be chosen.