I also recall that Crosville had a fleet of small Mercedes buses with a Dragon livery in the late 80s/early 90s?
The small Mercedes buses were branded as 'Little Dragons'
to follow the same theme. They had 20 seats except for two
which had 19 coach seats (MMM99 & MMM173 were their
fleet numbers). Originally given a life span of 2 or 3 years
they proved such a good work-horse they lasted many more.
The 'Happy Dragon' mentioned in Trojan's original post
wasn't the Coastliner but the 100 service from Conwy
to Talacre operated primarily by open-top double deckers
one of which was an old Bristol Lodekka (DFG 27) and a
closed top version (DFG 234) which was in the original pic.