You might qualify for the Bus Service Operator’s Grant (in England or Scotland) or the Regional Transport Services Grant (in Wales) if you provide a service where:
at least half the seats are available to and regularly used by the general public
stops on the route are in places that people are likely to use reasonably often - fixed bus stops or otherwise
single journey fares are reasonably priced
fares can be paid conveniently
the bus does not have signs or any other indication that it’s not available to the general public
information about the service, its route and timetable is accessible to the general public
advance bookings of flexible services do not deter people who want to make a single journey
There are slightly different conditions if your bus service is intended for transporting pupils, people with disabilities or elderly people.
Source: Gov website