The Guy B Series was a range of trolleybuses which was produced by Guy Motors.
The Guy BTX was a trolleybus made by Guy between 1926 and 1935.
Coachwork was carried out by Dodson, Metro-Cammell, Park Royal, Beadle, Brush and Guy themselves.
The last BTX was withdrawn from service in 1949.
The Guy BT was a trolleybus made by Guy between 1934 and 1950.
Coachwork was carried out by Roe, Park Royal and Beadle.
The last BT was withdrawn from service in 1965.