The Game's not over yet Dave. Checked tonight and still getting a small drip, so had the clip off again and gave it another go. I also ran the engine to full temp and found that one of the hoses to the heat exchanger above the oil filter was getting moist. So in the end I've checked all the Jubillee Clips I could see, and most took a quarter/half turn easily. As I left it tonight, all appeared OK, but I'm wary of when it cools down again.........
As a side issue, I found a wet patch in the garage carpet in front of a rear wheel. and standing water on the running board. This was baffling. Natural reaction is to look up at the garage roof - but no drips. What I'd done was perch the washer bottle on the heater box. This is higher than the washer jets, and half the washer water had siphoned out and run down both sides of the Mog, leaving two big wet patches on the floor. I then spent the next hour drying this out Grrrrrrrrrrrrrrrrrrrrrrrr

So we'll see what tomorrow brings, but best advice is to check those Jubilee's.....