Didn't realise yous were waiting... sorry.... turned out the coolant leak was the valve right in the v, luckily my cousin had recently opened his own mot station and garage so he took the job on. It is alot to strip, inlet manifold, throttle bodies and egr removed, cleaned while they were off the car as only 70k miles and they were almost clogged with black carbon/gunk..... and i only use premium diesel and majority of my driving is motorway, both short journeys..... wouldn't have thought be a cheap job to a stranger but I paid quite alot for that job and that's family, good days work to strip and rebuild, without the extra time I spent at his garage cleaning the inlet manifold and egr valve, which I doubt would be a normal part of the valve change?