Well since my initial post it has been days of research and flipping between the Haibike Trekking and an e-mtb. A decision had to be made!
Nefarious's comment above just reinforced my inner voice saying I would enjoy an e-mtb, but budget only led me to bikes I was not entirely happy with. However luck (and in depth searching) prevailed and I am now about to pick up a new Giant Dirt-E 2 Pro 2018 that I managed to secure for £1750
I will do a review in the weeks to come
....one final question - obviously I will insure it, but what is the current thinking on the best security solution for locking up when out and about?