They're still relatively new. There's a lot more research and development that goes into an electric car, and the costs involved increase the list price when the car goes to market. There's also the cost of the batteries. With that said, they start to make more sense when you look at the finance costs and factor in savings elsewhere.

For example, an electric Vauxhall Corsa-e will cost around £50 a more month than the equivalent petrol model. That's on a four-year PCP deal, with an equal deposit. Factor in things like the cost of taxing a petrol Corsa (c.£13/month), fuelling it (you could save hundreds here depending on your mileage) and servicing it (EV servicing is usually cheaper as there's less components), you could actually save a considerable amount of money by buying an electric car.