I was on the pontoon on my own kitting up when the husband first popped up, shortly followed by this poor lady. After shouting for help I entered the water and towed her to the pontoon, de-kitted and helped pass her up. My dive buddy (a vet) quickly arrived and started working on her, and within 15 minutes there was a fast response vehicle, 3 ambulances and an air ambulance on scene, but it wasn't enough unfortunately. Tragic.
Kit was very negatively buoyant when I removed it, and there didn't seem to be any gas left to inflate. I was then kitting up again to enter the water and look for the third diver once the husband alerted us to his presence - thankfully he surfaced a few minutes later after completing his deco.
A bad day all around really.