The website
https://www.transportforcornwall.co.uk/our-partners/go-cornwall-bus-copy/ says
"Cornwall Council recently awarded an 8-year contract to Go Cornwall Bus (Plymouth Citybus/Go-Ahead) to operate the whole of the county supported local bus network. This equates to around half of all bus journeys made in Cornwall. First Kernow will continue to operate commercially within the county.
Services under contract to Cornwall Council will be branded as Transport for Cornwall. Many bus services previously operated by First Kernow will be run by Transport for Cornwall. Go Cornwall Bus will be working with three local operators, namely Hopley’s Coaches, OTS of Falmouth and Summercourt Travel Ltd, to provide the whole supported bus network.
Transport for Cornwall is the name of the partnership between Cornwall Council, Go Cornwall Bus and other local public transport providers working towards the delivery of the vision for a high-quality, integrated and customer-focused public transport network."