T1 is a bus route operated by First West of England that runs between Bristol and Thornbury.

[5] From 2 April 2023, due to government funding, the frequency of the service during weekdays was restored to every 20 minutes.

[6] The bus leaves Bristol heading north bound on the M32 to Junction 1 at Hambrook where the bus leaves the motorway and briefly joins the A4174 Avon Ring Road before turning onto the Stoke Gifford By-pass through Harry Stoke.

[citation needed] When the route was first launched in 2018, it was operated using Alexander Dennis Enviro400 MMCs.

In March 2020, 13 brand new Enviro 400 City powered by Compressed Natural Gas were introduced onto the South Glos Lynx network of routes including the T1.