The UK's planned ban on the sale of new petrol, diesel and hybrid cars could start as early as 2032, Transport Secretary Grant Shapps has said.

Last week, the government sparked industry concern after bringing the date forward from 2040 to 2035 in a bid to hit zero-carbon emission targets.

But Mr Shapps told BBC Radio 5 live it would happen by 2035, "or even 2032," adding there would be consultation.

The SMMT car trade body had previously said the 2035 figure was "concerning".

News that the UK end date may shunt forward to 2032 comes as no surprise.

Norway has set a 2025 deadline for a ban on new petrol and diesel cars. Some Chinese cities are discussing a date around 2030.

At some point market dynamics will over-ride government policy anyway.

Bloomberg forecasts that the purchase price of electric vehicles will reach rough parity with fossil fuel cars by the middle of the decade.

That looks like a potential tipping point, as the costs for maintaining and running electric vehicles will be so much lower (until the chancellor finds a way of taxing electricity, that is).

But some experts are sounding a note of caution over the electric dream.

They say the only sure way of hitting the UK's emissions targets is to actually reduce the need for driving in the first place. They say the best short-term policy is to stop so many drivers buying SUVs.