Blue Triangle had been formed by Roger Wright by 1988, originally operating out of Romford.
The first regular bus service to be operated by the company was the Essex Heritage Route 622 from Great Yeldham to Harlow during 1988. The service was operated under contract to Essex County Council. Two former London Transport Executive AEC Regent III RT buses were used, RT2150 and RT2799. Both were painted in modified London Transport red livery with cream lower deck window area and cream upper deck below the windows. They had a red inter-deck band.
Blue Triangle also provided buses for London Sight-seeing tours at this time.
Following the success of these operations Blue Triangle operated Essex route 500 on evenings on Sundays in the early days of deregulation.
Blue Triangle have long been an operator of rail replacement services and also assisted London Buses when other companies gave up routes early.
Blue Triangle owned a number of special vehicles including an ex Green LineRoutemaster, ex London Routemasters and AEC Regent III RTs for use on charter duties. These vehicles were not included in the sale to Go-Ahead Group and remain in the ownership of Roger Wright's London Bus Company.
Blue Triangle operated Essex route 500 (Romford to Harlow via Epping) in the late 1980s/early 1990s in the early days of deregulation. Blue Triangle operated the route on evenings and Sundays under contract to Essex County Council.
Route 565 (Brentwood to Bulphan) was once operated by Blue Triangle. They also operated the route when it went from Brentwood on to Romford.
Essex County Council route 11 (Purfleet to Basildon) was lost to Clintona Minicoaches in January 2009.
Essex County Council routes 8B/8C, 101 and 256 were lost to First Essex in August 2010.
Blue Triangle was the last operator to operate route 502 (Loughton to Romford). It was a Saturday service with only one return journey.
Route 375 was won on a temporary contract as a part replacement to Essex County Council route 500, which was withdrawn between Ongar and Romford, Transport for London stepped in with this replacement service using just one bus. On 4 July 2009 this passed to Arriva Southern Counties.