RE: Overview and Scrutiny Models in Unitary Authorities
You could do worse than contact Derek Bishop, who convenes the Counties and Unitaries Scrutiny Network.
I don't have his details to hand right now but you may also have some joy in asking Paul Thistlewood, at the Isle of Wight, for advice on this as he is the Secretary of the Network.
I am fairly certain that they have recently gathered some fairly comprehensive information on this nature.
At the moment, we have just opened our 2012 Annual Survey for responses and in May we will have a comprehensive and up to date picture for ourselves. Our 2010 survey is slightly out of date now and while I could provide you with some examples from it, they might not all be current.
Research and Information Manager, CfPS