R400's just blown it's top!!
Discussion
Looks as though everything is okay with the car now. Flushed the system through on Saturday night and let the engine get up to normal running temp and all was well. Murph, when the coolant 'exploded' on Sat morning the engine only went up to 90 on the 10 mile journey home and didn't lose any more after the initial explosion so it would tend to suggest just an airlock. Something I did find out is that it had a new radiator fitted just before I picked it up. I took your advice and checked all seals etc and they all seem fine and having had a blat to Brands on Sunday the engine didn't get above 85.
Thanks weed, I've heard a few reports that it would be best to change the thermostat just to be on the safe side so I'll get that done at the first available oppurtunity. Not being particularly tech minded I'll get Caterham themselves to do it (especially as I've only just bought the thing from them)!
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