It is in terms of engineering an open top Olympus (itself a double-decker variant of the Esteem) in all but name.
The Optare Visionaire was also built for tri-axle double-decker bus chassis.
These all entered service and were the only order for the East Lancs Visionaire.
[1] An open top single-decker bus, the Panaire, was also offered at the time and none were built.
Wilts & Dorset received 9 Visionaires for use on the Purbeck Breezer services linking Swanage with Wareham, Poole and Bournemouth.