on a
London Underground replacement service at
Baker Street station in May 2011 Sullivan Buses was founded in 1998 by former
London Underground manager Dean Sullivan. Sullivan Buses operates public and school bus routes predominantly in
Hertfordshire and previously operated routes in
North London. Rail replacement work, particularly on the
London Underground, is also operated. In 2004, this work contributed to two-thirds of the company's turnover of £3 million. In January 2005, Sullivan Buses purchased Southlands Travel, located at
Pollhill in
Kent, but this operation ceased in February 2007, with some of the routes passing to Griffin Bus, who operated initially from Pollhill before moving to
Longfield. In May 2011 Griffin Bus ceased operations and their routes were transferred over to other operators. Due to increased traffic congestion,
Hertfordshire County Council-controlled route B3 was revised with additional running time and made significant changes to timings to meet train arrivals and departures from July 2012. Starting from September 2012, Sullivan Buses won TfL tenders for
school routes 628, 653, 683 and 688 from
Arriva London. This came after the company also won the tender for
route 298. Sullivan Buses won the TfL tender on
route W9 and retained route 298 in 2016, both acquiring brand-new
Alexander Dennis Enviro200 MMC buses as a result. From 1 September 2018, Sullivan Buses axed a section of commercial route 398 between
Watford and
Borehamwood. To minimise inconvenience, route 306 improved its evening frequencies to every 15 minutes. In May 2021, it was announced Sullivan Buses would take over the TfL tender for route 549 from 12 March 2022. In February 2022, Sullivan Buses announced the takeover of
route 84 between
Potters Bar and
St Albans, following
Metroline's decision to withdraw from the route. The effects took place on 2 April 2022. In August 2024, Sullivan Buses announced that they would be ceasing operation of their 12 London routes, citing financial issues and penalties imposed by TfL as reasons.
South Mimms depot will also be closed with all non-
TfL routes being transferred. ==Depots==