It would appear to be connected to the brakes, as i noticed the lhm surging through the filter when i pressed the brake pedal. It would appear to be picking up some gunk already, so thats good news & it would appear that the flow rate is quite high so it should clean the hydraflush & hopefully avoid too much dirt/scum getting into the main lhm tank. I fitted it in exactly the same spot as the other lads, i've used a smaller filter, so if that gets very dirty i'll try changing it for a larger one. Was a bit of a pain getting it to stop leaking, but with some fiddling it would appear to be leak free for the mo, i'll check it daily & i might re-position the filter if the leaking starts up again, it might be a bit close to the lhm tank & so is putting a bit of pressure on the hydraulic pipe that normally is fitted to the tank.
I'll report my findings as i go along.