The Toyota Mirai is currently the only hydrogen fuel cell car on sale in the UK
Filling the car with hydrogen is no harder than filling with petrol or diesel
Fuel cell technology is advancing. You can see the super-tough fuel tank in the middle of the car
There's still an engine - of sorts - under the bonnet
The Honda Clarity is already on sale in America
New electric MG4 hatch to start at £25,995
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Kia EV4 SUV to take on the Volvo XC40 Recharge