Lpg the other week 64p litre so 9 pence kwh- that's why I asked for the lpg price.
I'm looking at 10p/kwh, but am getting 6p back, and that 6p will rise by CPI, so will likely be looking at net cost of 3.5p/kwh going forward. Propane has to be cheaper than 25p/litre to give better value (ok, I'm imagining my boiler was free and doesn't have service and repair and running costs - but from where I am now, that's roughly where I'm at.)