Re: Heating options
With the price of oil as it is and unlikely to rocket up again any time soon (barring unknowens of course) oil would soon work out much cheaper than the alternatives.
Initially an oil boiler costs more than LPG but oil is quite a bit cheaper than LPG - and a heck of a lot cheaper than electricity plus they are cheap & easy to service.
There are lots of places which compete to supply the cheapest oil too.
When you look at comparisons please note that heating oil has been under 30p/litre for the last year or two compared to LPG at around 70p (from my looking for LPG, not from personal experience as with oil).
In fact I filled my oil tank up earlier in the year at just over 20p/litre and even now that it's busier (as it gets colder or nearer winter) it is still under 20p.
So spending a few thousand more for oil compared to gas at current prices it wouldn't take many years before oil is working out cheaper.
But it depens on your situation.
Personally I would avoid electric heating at any cost.