Possibly TM but some recent investment research on BRS (Evercore ISI) estimated the global offshore market at 1700 ac of which CHC have about 240 (25 idle) and BRS have 250 (of which about 40 are associated with the academy and not really offshore ac). This means a combined CHC BRS business would have around 430 ac, of which a sizable chunk are SAR or HEMS equivalent (ie not offshore)
I'm not dismissing your fears out of hand but if the investment research is broadly accurate, we're looking at less than 400 out of 1700 ac which is hardly a monopoly at less than 25% of the global market.