...it's too dark now to do much investigation other than there is practically no water in the engine!
I did a 10 mile round trip...what with a new baby in the back & my radio playing (ie head in the clouds) I didn't notice anything until i got home - it was like a nuclear furnace under the bonnet. Any guesses what damage might have been caused?
If it's the head gasket (due to there being no water)...what's a fair price for replacement? How long would a skilled mechanic take?