I suspect it was caused because i changed the clutch, using the method where you remove the engine, so perhaps strain upon removal etc, about 500 miles ago. I did notice that the coolant level would drop a couple of cm's each week, and on sunday night it just started pissing it out. It was drip.... drip.... drip with the engine off and drip drip drip drip drip drip drip drip drip with the engine on
Anyhow all is well now, new genuine water pump, timing case, timing block, coolant aperature gaskets (genuine) and one OEM Kelloggs Cornflakes™ Fuel Pump Gasket (it was a choice between corn flakes or rice crispies), with a smear of hylomar on the back just to be safe. Greased all the gaskets as well. I did go through several pairs of underpants though, especially when removing the camshaft sprocket i managed to turn the camshaft Thank fully it wasn't that bad to reset the timing, as it was just a case of lining up a few arrows, but it was still a PITA!!! Timing belt changed, with all new oil seals and tensioner. I was literally shaking when switching her on though, that wait for the fuel system to prime, while you crank is traumatic. All is well, engine sounds nice and clockwork in the engine bay (shame it doesn't sound so nice, by the time its rattled every panel on her) and to say i am relieved is a massive understatement. Thanks for your help guys, much appreciated. Hopefully i will never have to see that gasket again