Today I replaced spark plugs and fuel filter to see if it was something to do with those. Still the same. I decided to get under the car, I thought if coolant not visible up above, then maybe down below.
This is below the engine at the gearbox, so cylinder 1? Does this indicate a leaking head gasket. Pinkish run down and the UV light highlighted it green - I had put some UV dye in the system to help try and find the leak. Looks mighty wet!