So if it takes an A of P to repeal a previous decision of Parliament, then surely Parliamentary decisions apply to successive governments? Don't they?
Statutes don't just cease to apply with a change of government, if that's what you mean. But the point is that a successive government can simply amend or repeal anything it sees fit, so it is not bound by the decisions and legislation of previous governments. It has the power to change it.
That was exactly my point! As bolo has shown it takes another process and AofP to repeal governmental decisions, you can't just forget about previous governments agreements, treaties, etc, you have to explicitly repeal them.
Now if UK started explicitly reneging on previous agreements, treaties, etc with other countries, organisations, etc, what would that do to the general consensus of opinion, of the UK, internationally? We would devalue ourselves to the level of failed dictatorial states.
So reasonable governments do not simply renege on previous treaties unless there is an internationally recognised and acceptable reason.
I rather think that the majority of MPs and Lords would realise that and simply not allow us to renege on the EU Treaty.
Therefore your assertion that previous agreements with EU can be simply ignored because they don't apply to successive governments is simply untrue.
An exit from the EU would still have to abide by the exit rules.
If this is the height of your understanding of governmental and international business, it doesn't say a lot for your understanding for the in-out decision.
I've only included your quote below in case you do what another poster did yesterday and removed, as far as possible, and completely changed the rest of their comment after I'd responded.
But say the U.K. did eventually get a sensible government which just said "We're out" as of whatever date and told the EU to "take a hike" as far as all the "leaving arrangements" are concerned.
What would the EU do about it?
As I've indicated, it won't happen. It would be counter-productive and self-destructive.