Big Bear
You are just trying to save billions of pounds here aren't you. Or, are you missing the importance of MPA?
With no MPA our sub surface fleet was instantly ready to be intercepted and scanned by anyone with any kind of sub........Thus removing our nuclear deterrent and cruise boats effectiveness at a stroke.
The are lots of unfriendly nations out there who would happily buy sound recordings of our subs, as well as having subs of their own to do something nasty if they wanted.
Not having effective MPA today means having no credible sub surface fleet in ten years time when we get involved with some despot or other.