Can non chlamidial ngu cause pid in female partner. Gonorrhoea, chlamidia, mycoplasma genitalium, ureaplsama, trich all negative. No std found.?

Probably not. Neither PID nor any other health problem has ever been documented in the sex partners of men with NGU not due to chlamydia or M. genitalium. Does your partner have PID, or are you just worried concerned about it? If the latter, my advice is to not worry. If PID is suspected, she of course should see her doctor or perhaps an NHS GUM clinic. Otherwise nothing need be done.