Reading the original post, I see this...

A Tory administration overseeing English health, transport, education, social security and environmental policies would be so powerful it could not take orders on foreign affairs and taxation from a Labour Westminster government in charge of the last non-devolved issues.

It does seem problematic to have England as an undivided component. But, really, Greater London should be a federal district (New Labour restored the Mayor of London that Thatcher removed), and then maybe the North of England could try again to get a regional assembly?

A society committed to the notion that government is always bad will have bad government. And it doesn't have to be that way. — Paul Krugman