Here is the Iain Murray list of safety recommendations
In my view, they have missed the boat on rescue diving.
Clearly not interested in surface supply air. Instead, SCUBA-equippped divers and "rescue swimmers."
Most of these come across as recommendations - to be applied in ways suiting individual syndicates.
However, there is some good stuff here.
And, according to this, a high level of cooperation (concerning safety) among the four teams.