Thanks for your question. If you're regularly clocking a lot of miles, diesel does still make perfect sense, even though it's now a little 'out of fashion'. We'd only recommend a plug-in hybrid if you're able to charge from home via a 'wall box' and make the most of the electric-only range. Petrol and 'self-charging hybrid' cars can be very economical as well, so are worth considering depending on the sort of annual mileage you do.