... if there is anything else that you think might help just let me know. Cheers
OK you've bitten-off a big chunk of analysis here and you need to be careful how you sample the public - if you want credible results.
There is a quote from Steve Jobs saying that "Dont ask people what they want, because they don't know what they want, until you give it to them'! It was probably referring to the IPod, which came from nowhere and, as we know, sold in billions - and reshaped the music industry!
The EV is not really working quite as well as the IPod and part of that is that people don't know what the want from an EV. They don't even know what questions to ask - and frankly no one even has the answers yet!
If you want to want to get coherent answers you may well have to create a scenario for them - to have any hopes of usable results.
In my view you need to look a 'sustainability of personal private transport' with dwindling petro-chemical resources? You could even create a context of a recently independent Scotland? If oil reserves are dwindling and the economic climate mitigates against gas/oil imports then the EV is a de facto solution? I suspect the Scottish Govt believes that you have great potential to be self sufficient using renewable energy - hence the very, very ambitious targets?
Finally a warning that will probably get me in deep trouble! That is the usability of data from current EV 'early adopters'. From insights I have had politicians prefer to ignore the opinions of 'early adopters'. There seems to be compelling evidence that shows that early adopters have a broad range of 'justifications' for buying an EV. I won't dare highlight them here - but put simply their motivations are quite different from the core of the population.
It's the inertia in the marketplace that is puzzling industry and Govt - so maybe your research can shed some light!