The 'Bristol Legible City' initiative was indeed ground-breaking, and has been emulated elsewhere because it did what it sets out to do very well. Details are here:
https://www.bristollegiblecity.info/The 'Legible City' maps are very much aimed at pedestrians, so they show bus stop locations but don't show bus routes - too much information can be as bad as not enough. Producing clear maps is not easy, and no map can show everything.
There was a Legible City exhibition at the Architecture Centre early this year, and there was a board there showing bus route map displays for use at bus stops. They were similar to the London ones, showing the different routes from the stop snaking off to the various destinations on a schematic map. But very much part of the Legible City system, using the same colour schemes, fonts and iconography.
However, it wasn't clear whether this was part of the original system that has been abandoned, or a new proposal, or what.