La Fée Bus (RM255) was built 1959, I converted 2000, still rolling 20 years on:
https://www.youtube.com/watch?v=F5aPojRso0E
I believe the London double decker is the ultimate mobile billboard, only in our case also with a bar on each deck for on-trade cocktail training and events like university balls
Seedlip Jan 2020 campaign
https://www.campaignlive.co.uk/article/seedlip-launches-debut-ad-campaign-dry-january/1669960