Not all the facts in this play were properly researched.
At the end of part 8 when announcing the sinking of the Belgrano in the House of Commons, Quote...."our submarines did not attack escorting destroyers in the hope that they would assist survivors"
Well not quite... The ARA Bouchard was hit by a torpedo from HMS Conqueror (the third one it fired) which didn't explode, but crippled the ship.
Tell you how I know, one of my best friends was on it. It's not something you'd easily forget, being in a ship hit by a nuclear torpedo.
Then quote... "regrettably the escorts rapidly removed themselves from the scene before picking up their own men in the water"
Actually the Bouchard was taking on a lot of water, and they had to fix that first of course besides having no steering afterwards and could only navigate in huge circles in the hope of saving survivors from the Belgrano which they eventually did, a day later.