Sorry Steve, no idea on value, but they look like the kind of thing I'd like to own/read. Pending what valuations you end up with of course, please do keep me in mind if you sell.
Cheers
Steve
These used to be really sought after years ago, easy £50 each. But they been re-issued and re-printed in so many guises since they're more like £20-30 each now. The ESB one was the rarest.