Oh god, heat pump.
I absolutely resent having to fork out £300 to £600 at a time for oil in winter (in a 1300 litre tank, it was double that in old house, which was a 2500 litre tank - I spent £1200 on one winter fill).
When Russia invaded Ukraine, the prices spiked from 45p when we moved in (July) to 60p (normal for winter) to £1.30 by March, and they stayed around the £1.10-1.25 mark for a very long time.
I absolutely hate that it is not regulated. Every time I order oil now, I think ‘am I going to find a house to buy and have to leave £500 of oil for the next tenant?’
I hate that the oil clubs can under deliver then argue they have not because ‘you can’t get an accurate reading.’
We actually moved out of a (crusty old, Uninsulated, single glazed) rental because the oil cost went from around £350 to £1250 A MONTH in March 22.
(we did not buy any, we turned it off and froze, then spent the next 3 months looking to move)
You need good insulation and a lot of radiators with heat pumps. And they can cause noise - if not noise you can hear, a low pitch one you can feel. And you need lots of rads. Have a good read on old MN threads.
Despite the above I would go heat pump every time, oil is a volatile ballache and not being on it is my no. 1 criteria for our next move.