oil fired central heating yearly costs

[Cocolove]

my partner and I have fallen in love with 13th century farmhouse, It is already slightly above our rent limit that we had planned on but it so beautiful and can already see ourselves in there. the only problem we have is it has oil fired central heating. does anyone know roughly the yearly cost to fill tank etc and is the heating problematic etc. this seems very daunting to me as have until now always lived in characterless new builds until now

Ours is grade II and we're not allowed to change the windows (Georgian).

The only bit we have with double glazing is a fairly recent extension to the hall. Strangely, despite the double glazing, that is the coldest bit of the house.

rock yes, in the SW. We got Heritage involved as soon as we bought the property. Some of the windows have been repaired & some replaced with this special glass. We even managed to get (very fine) double glazing in a stone mullion.