I can thoroughly recommend the book 'Against all odds' by Challen and Harris, it's a great read. The 'Speaking Sidemount' podcast is also a great discussion.
There's also some TV coverage and interviews on YouTube. One has the Thai commander who spoke in awe of the Brita and how quickly they moved through the caves, and how much the Seals struggled in comparison. John Volanthen and Ric Stanton, who found the boys, and the two other British divers, Chris and Jason (I think) who also dived the boys out. On of the TV shows includes the American guys that did the equipment with the positive pressure masks, which were the critical piece according to Harris. And the Thai pump crew that were shifting the water out.
From what I've read the Brits didn't need immunity. It was Dr Harris that was sedating the children and approving them to dive, so he carried the negligence risk. If any children died due to sedation error it's manslaughter. The Brits simply had to trust his judgement and his doses for the pop-up shots, so they had no criminal culpability.
There's also some TV coverage and interviews on YouTube. One has the Thai commander who spoke in awe of the Brita and how quickly they moved through the caves, and how much the Seals struggled in comparison. John Volanthen and Ric Stanton, who found the boys, and the two other British divers, Chris and Jason (I think) who also dived the boys out. On of the TV shows includes the American guys that did the equipment with the positive pressure masks, which were the critical piece according to Harris. And the Thai pump crew that were shifting the water out.
..........One issue I heard which may not be true. Is whilst the Australian diplomatics went to great lengths to ensure their citizens where protected from prosecution if the rescue was unsuccessful. The UK foreign office made no such efforts, which as a British citizen is extremely worrying.
From what I've read the Brits didn't need immunity. It was Dr Harris that was sedating the children and approving them to dive, so he carried the negligence risk. If any children died due to sedation error it's manslaughter. The Brits simply had to trust his judgement and his doses for the pop-up shots, so they had no criminal culpability.