Re: Let's not question the EU
a) Your maths leaves a little to be desired.
It's far more correct than yours.
b) You could equally read that those happy to stay number 63%
No, you could not. People who don't vote are implicitly declarding "I don't care, somebody else can choose" which means they agree to go with the majority decision, which was to leave.
The non binding nature of such referendums was soon forgotten.
That's sophistry. There is no point in asking for a formal vote and then ignoring it because it was supposedly "non-binding". If that's all you want, just use an opinion poll.
Referendum shows deep discontent, we need to make some changes - we'll see what changes we can make over the next 5-10 years and then come back and ask again.
That's exactly what happened. Cameron said that there was deep discontent, so he would work to negotiate changes and put them to a vote. He negotiated bugger all except window dressing, which was completely unsurprising since the EU was never going to accept anything else. He then lost the vote.
If we go through with this, then we can never reverse the decision - the best we could do would be to apply to join as a non founder full union member..
And? We never were a founder member. The common market was founded in 1957, De Gaulle didn't want us to join and we didn't until 1973. By the time the EU was created out of it we were just sucked in with all the other members, few of whom even had a chance to vote on the issue.
If it all goes wrong, and it turns out that the EU is the only future for Europe, we can of course hold another referendum in 20-odd years to ask to rejoin. Personally I'd be surprised if the EU still existed in its current form by then.