Trent Barton launched the "Spira" bus route with this logo.
Trent Barton insignia was removed from the logo in September 2011, when the route was deemed "unprofitable". It was transferred to Sheffield company TM Travel.
TM Travel relaunched Spira with a new logo and new vehicles in August 2015.
Sheffield's Line 4 | Sheffield's Line 30 | Rotherham's Line 31 | Peak Line 218 | Spira