The best commentary out there on this sordid tale is here, here, and here.
UPDATE: Reader Andrewb points to a quote that describes the depth of death of the Royal Navy. For your GMT; the First Sea Lord is like the CNO and SECNAV all in one.
...the First Sea Lord, Admiral Sir Jonathon Band, said the way the patrol crew had dealt with their captivity was a credit to the UK.
‘I think they acted with considerable dignity and a lot of courage,’ he said. ‘They appear to have played it by the rules. They don’t appear to have put themselves into danger [or] others into danger … they don’t appear to have given anything away.’