Well I can only comment on the time i had a seal problem on a kit for ryr. During the audit of the contents I was shocked by the poor quality of equipment. It was of no higher standard than a kit in a vw or boots off the shelf little first aid box. Compare that to the compulsory Extensive doctors kits and uk first aid kits and there is a greater chance , as i said , in any med emergency to get treated with the kit that might save you on a uk aircraft.I'm not blaming ryr , just its pet regulator and the other toothless tigers at the belgrano.