Why didn't anyone tell me before, Mister B? So NATO is us, The USA and China, right? Anyway, luckily, I mistakenly said
"Iran joins NATO. Israel and the US bomb them. The rest of NATO is obliged to retaliate"
Note the accidental use of the word REST. So I need to adapt my new scenario in light of this new intelligence:
Arab League sanctions Iran. Iran applies to join NATO, EU and Euro zone and is accepted because it puts in the lowest bid to build the UK's new generation of nuclear plant AND the Trident replacement. Israel and the US bomb Iran because they need a war that can give quicker results than the previous two in order to push through their Defense (sic) spending bill. The REST of NATO is obliged to retaliate (an attack against one is an attack against all). We're at war. UK surrenders to the US so we're all effectively POWs, and the country is annexed. US has to pick up our national debt and everything is rosy.
I'm going to lie down now.