Registered bus services
Operators of local bus services carried out in accordance with Section 6 of the Transport Act 1985 must register their services with a Traffic Commissioner in the traffic area in which the service operates.
The Driver & Vehicle Standards Agency (DVSA) maintains an Operator Licensing Business System (OLBS) to record these registered services. All local bus services in Great Britain in the system are available as open data.
You can download this dataset on the data.gov.uk website here.