BV, remember the various war options: wars of necessity and wars of choice. The Falklands was arguably the former though, as a n overseas territory we could have left them to their fate.
Kuwait, like Poland, was a war of moral choice.
Now which first world power might involve us in a war of necessity? Spain is a possibility as are Turkey or Greece over the SBAs. Of choice? A country with whom we have a mutual assistance treat, say one of the former colonies? We can discount Africa as they are not first world class opponents. We can also discount the Middle East which really leaves the Far East. Our commitment is probably the traditional Malaysian one with a threat from the North rather than the south.
In essence, apart from maintaining a policing role against Russia, the balance of our forces is probably adequate for the more likely different role in our areas of interest. What we have to hope is that our bluff isn't called.