Not sure what the Brits ROE was, but they should have been on their toes. As far as getting what they wish for, you are correct. However, the maneuvering room is kinda tight and I remember the amphib assault ship that was hit during desert storm. I certainly hope that if the USN deploys some additional assets to contest the waterway, they have hair trigger orders to fire.
I'm no expert on naval tactics, especially the dispersal range between vessels, but I'd guess the best way to protect a task force from that which you mention is to deploy in depth and use some sort of a screen forward with those hair trigger orders and ROE. The important thing is to notify (in a subtle and discreet manner) your potential foe (if a state of war does not presently exist) of the changes.
The message being: Okay you managed to score on our friends from the UK and now we are going to reinforce. IF you try that same crappola with US, this is what is going to happen....you have been warned. No further warnings will be issued.
What do you think 'Zilla? Would you agree?