Am all in favour of going private. Last year my mammogram was fine but my surgeon does an ultrasound as well and it was on that that my second breast cancer was found. Just had my second 6 month check up and again the mammo was fine but the radiologist was not happy with something he saw on the ultrasound so did a core biopsy - luckily it turned out to be scar tissue. But from my experience it has been the ultrasound that has showed up the BC not the mammogram.