Cardiff Daimler Fleetine 550, PKG550H, with Willowbrook H44/30D body, one of a batch of 25 delivered in late 1969, about 10 of which were used to replace the final Cardiff trolleybuses.
However 550 didn't enter service until 30th April 1970 because it was being painted with scenes of Cardiff to a design by the local college of arts in a scheme sponsored by Silexine paints.

Photo taken by Andrew Green, c. Oct 1971, Cardiff