Aah, ok that makes sense, I did uch up my jubilee clip on some hoses at the back of the engine shortly before the steaming incidents, as they were very only just on, I wonder if one is leaking or kicked now. I will take off the engine cover and have a look this weekend or after work this week.
So frustrating as it's driving the best it has in a very long time and 99% of the drive has no trouble....