Does anyone have any recommendations for my Dad? They've just baught a house to retire to with no central heating, and no gas.

What are the options they have regarding heating & hot water?

I think he'd like a little independant advice rather than me just saying it'll be cheaper than installing oil :-) What are the best sources of info for a newbie to the subject? Prefereably showing a comparison of costs between the options because I think at the end of the day, that will be what swings it either way.