I'm really confused about what type of car to go for next. I'm concerned for the environment so was thinking along the lines of a hybrid but hearing good & bad things about them & running costs, and doubt I can get much within my budget (£10-12K) so will this force me back to petrol?

I do about 10-15K miles here and little or no urban driving. I work a lot on farmland (think muddy tracks in winter) so 4WD useful but not so if too pricey, but high ground clearance a must. I need reliability and affordable running costs; not bothered on brand, anything that holds value an advantage. Power-wise something intermediate, perhaps.

Never leased a car, and unsure of the advantages over private ownership. Just want the most economic option all round. Any suggestions from anyone? TIA.