A few years ago over the North Sea I was controlling a civillian pax ac (type and airline will remain anonymous) under a RAS. I called a FJ conflictor, offered avoiding action and the pilot called visual happy to continue - pilot is now responsible for separation against that traffic. A few moments later the FJ traffic turned towards said pax ac. traffic info was updated - still visual. A few minutes later - an airmiss was declared by said pax ac against FJ.
RAS wanted until RAS impinged upon expediency, slot times etc.
Cake and eat it rings a bell.
If you choose to fly in the open FIR with fare paying pax you must accept the responsibilities of mixing it with other traffic.
I pray we never have a nasty.