Cities and Local Government Devolution Bill [HL]

My Lords, I am grateful to the Minister for reminding us that the Bill applies only to combined authorities. Can she confirm that? I want to return to a question asked by my noble friend Lady Hollis on whether a mayoralty will be insisted on by the Government in discussions with a combined authority. It was said that that would be a matter for individual discussions. Surely the Minister and the Government must have some guiding principles? Surely the Government cannot enter into discussions with a range of combined authorities with different scales, resources, problems and issues and not have any basic principles to which they are working? Otherwise it would be a matter of great unfairness. One combined authority would not have to have a mayor to be granted certain powers while another one could be told that it had to have a mayor to obtain exactly the same powers. I say to the Minister again, and I am sure we will keep returning to this: surely the Government must have some principles in mind of what powers would trigger this requirement to have a mayoralty.