"Then there's the West Lothian question, which nobody seems to be mentioning. This time we really could get a Tory majority in England but still ruled by Labour because of all the Scots and Welsh Labour MP's, when those two countries have their own assemblies as well."

Funny that nobody ever bothered about the West Belfast question or the more recent Sewel Motions? For most of its existence Northern Ireland sent MPs to Westminster whilst having devolution at Stormont. Hence Westminster has for some time worked on this type of system but it only became an issue for the British media when those darned Scots wanted more democracy - and it took a Scot to point it out an name it. Still you are right. The issue was mostly a theoretical imbalance but it will be more magnified if it becomes a reality. Prior to the SNP administration in Edinburgh the actual working imbalance had been the other way with Labour at Holyrood bypassing the Scottish Parliament in Edinburgh and having what should have been devolved matters put to Westminster instead. This was the so called Sewel Motion which occurred over 60 or so times.

Of course it is our cock eyed system which makes these anomolies. A clear majority of MPs going down from Scotland to Westminster will be Labour MPs but of course quite a minority of Scots will actually vote for Labour. Likewise more folks in England voted Tory at the last election but Labour still had a reasonable majority of the English seats. As long as Labour are benefiting from an outmoded two party system they won't complain much. And likewise the Tories were happy enough to benefit from Ulster Unionist backing in the past.

Anyway it took 100 years for disaffection in Scotland (which ebbed and flowed over that time) to eventually lead to devolution. If there becomes real disaffection in England because of the next parliament then it will be sorted pretty quickly in comparison. Sheer demographics in parliament itslef would ensure that. Put quite simply the vast bulk of MPs are English.

As to hung parliaments themselves. Well we already have one in Scotland. The minority SNP government have their hands tied on some issues (eg they can't get enough support in Parliament for their independence referendum) but in the main the country hasn't ground to a halt because of it.