The current thread on boilers made me return to this one as I wanted to reference some of the graphs.
Re-reading my comment regarding the economics having looked at the price of from Primagaz of 10-14 cents a kWh and it is clear my hunch about it being different in France was more-or-less correct, looks like a heat pump compares very favourably to Primagaz - how much is mains gas per kWh in France?