A fun bus-wrapping ad!
England isn't the only place with double-decker busses, as here is a Chinese bus on the streets of possibly Hong Kong, China or Macau that's extra tall & extra Sonic themed. It has a bus-wrap ad for Sonic & Mario at the 2020 Olympic Games. There's a large square ad for the middle showing (probably) the box art with the title (which is in Traditional Chinese letters), then the band between the floors of the bus has individual character stickers all in a row. These are big too, probably 2 to 3 ft high for each sticker of characters who are in the game.
It's a fun way to get word out about the game, it's just too bad the Olympics itself had to be put off for a whole year due to the virus. However, the video game can still release because it's something fun to do at home.