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|Parent||First South West|
|Service area||Mid and West Cornwall|
|Service type||Bus services|
It was announced on 6 January 2020 that Cornwall Council had awarded the entire tendered bus network in the county, except the Truro park & ride service, to the Go-Ahead Group from 1 April. It be operated under their Go Cornwall Bus brand. The contract consists of 73 routes, which made up roughly half of the First Kernow network at the start of 2020. First will retain their commercially operated routes and the Truro park & ride contract.
Kernow routes mainly cover central and west Cornwall, west of an imaginary line connecting Camelford, Bodmin and Fowey, although two services continue along the north coast from Camelford as far as Bude.
Kernow operates the Park for Truro service in Truro on behalf of Cornwall Council, as well as services intended primarily for university students between Truro, Redruth and Falmouth University campuses in Falmouth and Penryn (using route numbers prefixed U).
During the summer months, Kernow operates open top buses. In 2017, the service was relaunched under the Atlantic Coaster brand with Plaxton President bodied Dennis Trident 2s drafted in to replace the Alexander bodied Volvo Citybuses.
Most Kernow routes are interurban or rural in character, but there are local town services in some of the larger urban areas – Falmouth, Newquay, Penzance and St Austell, as well as the Park & Ride service in Truro.
Kernow took over some of Western Greyhound's routes following that company's sudden closure in March 2015, which meant that First returned in force to Newquay and neighbouring settlements (including Padstow, Perranporth and Wadebridge), where nearly all services had been operated by Western Greyhound for some years. Western Greyhound had also possessed some services in the Penzance and St Austell areas, most of which were also transferred to Kernow.
Many rural routes where lost when the contract was given to Plymouth Citybus by Cornwall Council in March 2020. The only bus routes still operated by First Kernow are the A/U/T/L routes, the 24, 27, 35, 47, 87 and 91. These are operated on a commercial basis. All of the Truro College routes and some school buses are run as well. 
The principal maintenance depot is at Camborne with a second in the Newquay area at Summercourt, which was acquired from Western Greyhound after that company had ceased to trade. The depots at Penzance and Truro also carry out some vehicle checks and minor maintenance.
First Kernow had an older fleet of buses, virtually all of which had been cascaded from other FirstGroup fleets. They included Plaxton Presidents on Volvo B7TL and Dennis Trident 2 chassis, Plaxton Pointer on Dennis Dart chassis, Optare Solo's and Mercedes-Benz Citaros.  Several closed top Volvo B7TL Plaxton Presidents were converted to part open top for 'Atlantic Coaster' routes for the 2017 summer season.
First Kernow received 30 new Alexander Dennis Enviro400 MMCs in late 2016/early 2017 for use on its U1/U2 (blue livery) routes and the Tinner T1/T2 routes (red livery). A further 21 Enviro400 MMCs and 20 Alexander Dennis Enviro200 MMCs and a number of Optare Solo SRs were purchased in December 2018.
Most services use green buses or those in First Group corporate pastel colours. Certain branded routes have dedicated liveries:
- Companies House extract company no 1669417 First South West Limited
- First to buy Truronian Archived 24 December 2013 at the Wayback Machine Bus & Coach Professional 15 February 2008
- Anticipated acquisition by Firstgroup plc of Truronian Limited Archived 24 December 2013 at the Wayback Machine Office of Fair Trading 11 April 2008
- "New cont5ract award for Go Cornwall Bus". Plymouth CityBus. Retrieved 9 January 2020.
- "Langarth Park & Ride - Truro First Kernow". Moovit. Retrieved 9 June 2019.
- Kernow summer 2017 changes[dead link] FirstGroup
- First: Devon, Kernow, Somerset, Truronian Archived 18 May 2015 at the Wayback Machine UK Buses 1 September 2013
- First Kernow receives £7.4m Alexander Dennis fleet Coach & Bus Week 31 January 2017
- First cements Cornish comeback with £8.4m order Buses issue 757 April 2018 page 8
Media related to First Kernow at Wikimedia Commons
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