First Bus has today (March 12) announced a number of their buses have been impacted due to driver shortages and staff sickness. A tweet issued by First West of England this morning confirmed "there are a number of buses off across all of the Bristol depots".
It was later confirmed by a spokesperson for First Buses who said: “Due to the ongoing driver shortage, and current staff sickness, unfortunately, a number of our buses are not running."
Passengers are advised to check the First Bus app on their mobile devices throughout the day to ensure they're aware of any cancellations or delayed services.