It's great to see such a rare and unusual bike beautifully restored to its former glory.
Yes, that's a photo of Geoff Apps in his country gent persona, sporting his tweed jacket and flat cap. He is pictured alongside a Phase III 700c Range Rider prototype that was the architype for both the later English Cycles' Range Riders and Cleland Aventura variants. Both models having frames and forks fabricated by Jeremy Torr in Telford.
These bikes do not belong to the Californian Klunker/mountain bike tradition, but instead evolved from an earlier homegrown British tradition that involved post-war teenagers modifying their road bikes to make them more suitable for jumping, wheelieing and riding off-road.
British Dirt Track Bikes
Apps cleverly used his experience of motorbike-trials riding to design sloping top-tube bikes with larger wheels and with more reliably powerful brakes than found on contemporary American 'mountain bikes'. Unfortunately not enough of these bikes were made and too few riders got to experience just how well they ride.
I hope that you continue to enjoy your Range Rider with its "lightweight front, so easy to hop over logs etc", for many years to come.