There was an apocyphal tale on a certain website with aviation content that rhymes with "TTune", about an RN sub paying a visit to Norfolk (the US version...). Apparently the sub was due to arrive at X hours, by X+2 hours it had not turned up so everyone was a little concerned. By X+4 hours they were about to send out the search parties when the sub surfaced - within the dockyard right next to the berth it was going to be using. Apparently the captian was invited to a meeting with the USN big wigs, no coffee, bring your hat, closely followed by a meeting with the UK Naval Attache which went "Bad boy, don't do it again, now sit down and tell me how you did it..."A similar and no doubt true story..... some huge UK/US and invited friends exercise, using a US carrier. At the post exercise wash-up Rear Admiral Elmer J Chickenshit lll stated that the US Navy had kept all the goddam submarines away from HIS carrier, yes Sirree Bob.
Whereupon the UK Lt Cdr boat skipper quietly placed a set of photos on the table, showing his carrier's screws in full technicolour, close-up majesty.
I posted this on a civvy forum where the spams were trying to tell the world how great they were at submarine warfare, and boy did I get dogs abuse! I had some ex-USN something or other laying out charts of the channels into and out of Norfolk showing how there was no way a submarine could get in without surfacing and in any case the <insert colour and keyword of choice> system would have detected them from 20 miles out....
Oh and I can't recall which thread but recently someone mentioned "Blind Mans Bluff", a book on the USN submarine antics against the Russians. I was wondering if there was an RN equivalent, but to be honest they wouldn't tell and if they did no-one would believe them.