Best Of

Putting aside budget and weight of caravan, there are 3 types of petrol hybrid. Mild, which is a small battery and electric motor set up to provide marginal support the ICE. The car will not run in any form of EV mode. Full, uses a larger battery/motor package which provides significant back up and can run in EV only mode for a few miles at lower speeds. Plug in hybrid as the name suggests is part EV, part ICE powered. These are charged the same as an EV or, can be charged from The engine and with regenerative braking. EV only range can be upto 60 miles with the very latest systems. Most are much less. The benefit of Full and Plug-in hybrids is they can bring diesel rivalling levels of power, torque and economy, albeit at a cost to buy new. The other disadvantage is they often come with quite low tow weight limits so care is needed when researching options. I have a a RAV4 PHEV and it suits our life style very well. The economy for a 2 tonne SUV is amazing and performance matches a hot hatch. 

You need to decide your needs in a car now and in the near future. Research the options within your budget and when you have a short list go on the forums for the relevant models. Albeit another topic altogether Personally I think diesel is getting an unfair hammering. Had the same money invested in the ultimately dead end EV technology in recent years been spent on clean diesel tech, we would be better served.