I might have been in your target area until my mother died a month ago. She was in Bedworth (just outside Coventry). However, like a lot of people I didn't live in the same area as my mother (I'm further away than most, but carers living away from carees aren't uncommon). So you might want to clarify whether you are only interested in talking to carers of local dementia sufferers or local carers of any dementia sufferers (even if the dementia sufferer lives outside your catchment area). Hopefully the latter: I think distance carers make (or attempt to make) more use of technological solutions than others. I say attempt to make, because as Nell has mentioned, while the internet is a godsend, the sort of technological solutions that are promoted such as alert systems, caused me no end of trouble, and my mother no end of distress (disembodied voices are NOT a good thing for a dementia suffer, and if there's a wrong button to press, press it they will).
Good luck with the project: I really think because of these sort of problems there needs to be empirical evidence about what does and does not work in these situations: most of these products are marketed and promoted by people who have little or no real world experience, at least on a 24/7 basis.