Cheshire West and Chester
It was established on 1 April 2009 as part of the 2009 local government changes , by virtue of an order under the Local Government and Public Involvement in Health Act 2007 . 
<triplet> 2009 local government changes <subj> 1 April 2009 <obj> point in time <subj> Local Government and Public Involvement in Health Act 2007 <obj> has cause