In reply to UKH Articles:
An interesting concept outside of Scotland. I was actually quite surprised at the location of the remotest summit on the mainland - I expected it would be somewhere in the Carneddau or the vast expanse of moorland north of the Claerwen Reservoir.
I'm somewhat surprised at the inclusion of Llandwyn Island, but perhaps because it was a regular 40 minute cycle away from where I grew up (so not seeming that remote at all). I'd dispute its inclusion in the Islands list as it is barely even a tidal island - it only gets cut off from the mainland in extremely high tides.
Despite many visits, I couldn't say for certain whether I have stood on the true 'summit' of it.