@Fjpod, as a soon to be owner of an Outlander phev, I would agree with your conclusions.
A quick check on the available chargers at supermarkets and car parks in my area shows charge rates of around £0.35 per kWh.
My off peak home electricity is £0.089 per kWh and will reduce to £0.05 per kWh once I switch tariff.
So using a commercial charger will cost around £4.55 to charge a flat battery and give circa 28 miles.
If I can achieve 35mpg using petrol/gasoline at £5.70 per UK gallon, then aside from any green benefits, there is very little benefit in going down the phev route. (Or all electric route come to that).
At £0.089 or £0.05 per kWh, it makes a whole load more sense
Especially as Mitsubishi are doing some great deals right now on low mileage Outlanders as they clear stock before leaving the UK market.