a) Westminster was elected with Proportional Representation
b) Local councils and other such authorities receive much greater powers; with constitutional safeguards on those powers to stop Westminster taking them away at a whim
c) Some kind of system of regional forums so local authorities can better discuss, cooperate and coordinate regional wide initiatives and put regional issues to Westminster
I don't agree with things like standardised health and education policies covering the whole of the country, because different areas have very different needs in these regards
There is no reversing devolution now though, so I think regional assemblies has got to be the way forward. That could be a good system for Scotland were to go independent mind you; but I'm not sure how eager the SNP would be to devolve powers to local authorities seeing as they have been very eager to gain as much power as possible for Holyrood.