Xabba, find the old threat(s) on the issue from some years ago, there I told names as well as links, plus it was BBC major news, if I remember correctly. I struggle to find it again. But it was confirmed by either the admiral commanding that expeditionary fleet, or the chief of the British navy . It has been revealed just some years ago, like it also was revealed just 5 or 6 years ago that the British had send nuclear weapons to the fleet, that then were transferred from the transporting frigates to the carriers. the argentininians had four submarines, two WWII-era boats, and two German modern Type-209, the latter definitely had the capability to penetrate the ASW screen of the fleet. that 209 also fired repeatedly at the fleet but over too great distances, thus all shots missed. The British failed to detect it for the whole duration of it's operation time - the entire war.
If I were the navy, I would not talk much about my capital ships escaping by sheer luck, too.
It raises the question why politicians should pay for new carriers if these are so vulnerable to enemy subs.
One word on the human side of the war. Today, the number of losses on British side is counted to be smaller than the number of veterans of that war who have commited suicide due to posttraumatic stress syndrome since the war ended. Suicides on Argentinian side equal roughly two thirds of their KIA numbers.