Yes, by the way you have missed out the Suez Canal debacle in the 1950's. I was only a 'whipper-snappy' myself then, but all the wars you mentioned, although we didn't always have 'boots on the ground' in some (well officially anyway) cost us lots of money that went into and still is featured in the national debit, somewhere. Make no mistake Paul preparing for any emergency, be it pandemic or war, costs money and as we've seen with Covid, lots of money gets siphoned off into the pockets of the 'carpet-baggers' and it takes away emphasis on other things.
Yes, the armed services get decimated, in between such emergencies, it used to be known 'as the 'peace dividend'
I do think Sunak is right to worry about the next 5 years, I would say the next 5-15 years. However, I don't buy into his pitch about what a Labour government would do, that is just sabre-rattling/scare-mongering.
Because it is already a sideshow, the effects may not yet be fully felt that's true, but compared with what is likely to 'come down the pike' it will be something that will be put to the side, both here and in the EU; essentially because mutual survival (economic and political) will require some changes, the more idiot rules/regulations on both sides will be 'eased' or passed over. No one will be seen to be breaking any 'golden rules' of trade, but then again no one will be specifically looking.
'Black markets', smuggling, and other war time/emergency situations will occur if it becomes necessary... maybe the criminals smuggling people will be orientated towards smuggling goods.... less profitable, but much less hazardous in the future, especially in emergency situations. That is what is referred to as a 'wartime economy'
Paul If you haven't any idea who can do what is necessary, then Starmer is 'johnny on the spot' and we go with him.