Further to my last post I managed to get an NHS blood test done through my GP. Remember my previous creatinine 11 days earlier was 188 with a GFR of 31, so my creatinine with this test was 128 with GFR of 48, with all other factors being normal. From this I think the blood test done through the private lab was almost certainly incorrect.
Will continue with what I was doing - mainly vegan diet with small amounts of cheese now and then, and an egg a couple of times per week. Have also now been intermittent fasting for 3 months - only eating between 12 midday and 8:00 in the evening, lost 12 lbs and feel fitter. I'm also exercising 1.5 hours a day on 5 days a week, I have progressive MS so trying to stave off the inevitable - total immobility!!! Lesson from all this - never give up, just keep fighting!