The biggest concern with the british "navy" is the location of their nuclear armed submarine (I believe they actually have four, but only one seems to be "out and about" at a given time).
This will become more important when the country finally falls under full islamic control, probably within 15-20 years.
Are not the nuclear-tipped missiles on these furnished by the USA? (Perhaps for France, too?)
Sumthin' tells me that we know where the brit and french subs are all the time, and that HOW we know is one of the more closely-guarded secrets of the military...
(I could be completely wrong)