In 2004, First Beeline acquired a small fleet of Optare Solos route branded for services from Slough to Burnham. This is OOL53054 (LK53MDE) seen in the Slough depot yard.
Another of the six Solos, OOL53052 (LK53MBX) showing off the route branding on the nearside.
Four of the pink Solos can be seen in this view with a couple of Centrewest Metrobus trainers in the background.