Hi, the mechanic that did the work on my car is very good and keenly priced. I was introduced to him about 18 months ago when my heath took a turn for the worst. He like me is old school, but being in his late 30's / early 40's is young enough to have kept up with the new and not necessarily better b/s under the bonnet. He does exactly what I ask for. I supplied the oil (Castrol Magnatec 10/40 fully synthetic), all the parts,and he did the work. I never gave the antifreeze a thought. I took the car to him today and right there and then he went through it. Everything is ok. Whilst he checked the car over just inside his unit I suddenly noticed the temp gauge had moved to spot on half way and I put the adjusters on high and turned the blower to full. Hayho! nice warm air. what can I say after all my phaffing, um not a lot. It did cool down after a couple of minutes but it was around 22 degrees outside and quickly got warmer in the car. My mechanic friend then tried to explain the vagaries of climate control. He's got no chance, I am 71 next month and beyond repair mentally but I am still physically reasonably mobile. I have ordered some HOAT 05 and he will do the work when it arrives, and yes he uses a general OAT coolant. I will do the mods in time and once again many thanks for the help. Love this car ,but still prefer the simplicity and versatility of an Austin Maxi.(clutch renewal 35 minutes tops, head gasket under a hour etc, etc).One of most media maligned cars ever. All in my opinion of course. Once again Many thanks.