Vodafone
A 2007 ad in Vodafone's 'Make the most of now' campaign features Arriva Dennis Darts with Plaxton Pointer bodies (screencaps by stronghold):
Martyn Pearce also reports driving a blue/silver Dennis Dart in Watford High Street for a Vodafone ad.
A 2020 advert for Vodafone's 5G service features, incongruously, a GM New Look 'Fishbowl':
