Lox: Nonetheless, the Tories have shown that they are willing to work in a cooperative coalition.

No, they haven't. They've shown that they are willing to enter into a coalition. Whether they will be cooperative or not remains to be seen.

keithA: NI, Wales and Scotland have their own assemblies and parliament where the English have no jurisdiction, while their MPs decide on matters that only affect England. Such injustice threatens the whole Union.

Texas has its own assembly where the rest of the nation has no say. But Texas gets to vote on matters that affect the rest of the nation. Ditto every state in the 50. There are many issues that just don't affect a state because of geography, geology, or what have you. For instance border security doesn't really affect Montana. But Montana gets a vote in it. Seems pretty normal for a quasi-federal system.