I have to agree Dusty.
Granted, a plug-in hybrid car could be well suited to someone who had off-road parking and did mostly short journeys, with only the occasional longer trip. My wife, and my sister-in-law are prime examples. But I can't even begin to think how long it would take either of them to recoup the cost of spending Β£50k + on a car in the first place from the fuel savings. The cars they actually drive cost about a tenth of that.
For those such as myself, that regularly do long motorway journeys for work, don't do frequent urban journeys and like to go away in a caravan when we get a break, diesel is still the answer.
The reason for the popularity of plug-in hybrids, I think, is the company car tax benefits. My colleague has a Kia Niro PHEV as a company car and it saves her a fortune. But she only has on-street parking at her home, so rarely plugs it in and drives it most of the time on the petrol engine. Which means that it uses more fuel than my diesel-powered VW Arteon and emits more CO2 to lug the weight of those batteries around.
She wins (poor engine performance, pathetic boot space and the absence of a spare wheel notwithstanding). The loser is the rest of the planet.
I'll probably have to make a similar decision next year. Financially, it's a no-brainer. But I have a conscience ...