Strictly speaking, it hasn't been delivered yet. It's a Volvo/ADL testbed. It may conduct demonstration duties with other people first. It's not entirely confirmed yet, or atleast that I know of.
Not the first time this has happened.
Here's one from back in the day - photo credit to VRS323, William Walker.
New in December 1984, 770 (B770 GSC) had a very short life in Edinburgh. It was acquired in July 1985 by its manufacturer Leyland to be used as a demonstration vehicle in the Far East. It was eventually sold to Citybus, Hong Kong in 1990 ss5241 B770 GSC 198506e3 cpy
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Olympian 770 (B770GSC), the final bus of the 1984 batch of 34 Olympians, was used by Leyland as a demonstator before finally joining its sisters in Edinburgh in June 1985. By the end of the following month, it was off again as Leyland reacquired it for use as an overseas demonstrator (in connection with a potential order from Bangkok, if my memory is correct) and supplying a replacement 770, C770SFS, with the next batch of Olympians.
The demonstration never materialised and the bus was eventually purchased by Citybus in Hong Kong, becoming their fleet number 19. Latterly serving as a driver trainer, it was finally scrapped a few years ago.