A further wave of local government reform took place in April 2009 under the Local Government and Public Involvement in Health Act 2007. Following invitations from central government in 2007, a number of county councils and their associated districts examined ways in which local government provision could be rationalised, mainly in the form of abolishing the existing county and district councils and establishing one-tier authorities for all or parts of these existing counties. As a result, the status of some of these (mainly) more rural counties changed.