Now the Iranians have seized 15 British seamen, possibly hoping for a trade for Iranians seized in Iraq.
Although I've been critical of those who want to pick a fight with Iran, this is a horse of another color. Perhaps I'm old-fashioned, but seizing this many sailors of another nation and not returning them promptly is a casus belli (justification for war). Such a war need not imply "total war" or an invasion; it could be a blockade, along wiht a seizure of assets, or short of formal war, a raid or two to seize Iranian soldiers or sailors. Moreover, Britain is our ally in the Gulf, and if asked we might have some obligation to participate.
It doesn't follow, of course, that just because a state of war or something approaching war has historically resulted from actions of this kind, that an immediate military response is necessary or wise. However, without tit-for-tat retaliation at a minimum, more incidents of this kind are invited.
I doubt Britain has the stomach for such action, and I hope diplomatic measures and pressure short of military action will be successful, although if the events in the Embassy a quarter-century ago are a precedent, diplomacy and pressure may not have much success.
And of course, if neither we nor the British were there in the first place, none of this would have happened.