The Cleethorpes trolleybus system once served the holiday resort of Cleethorpes, in Lincolnshire, England. Opened on , it replaced part of the Great Grimsby Street Tramways, a tramway that had served both Cleethorpes and the neighbouring seaport of Grimsby. It was closed on .
By the standards of the various now-defunct trolleybus systems in the United Kingdom, the Cleethorpes system was a very small one, with only one route, and a maximum fleet of just 13 trolleybuses. It was operated jointly with the Grimsby trolleybus system.
History
Cleethorpes had been served by a tramway since 1877 when the Great Grimsby Street Tramways, which had been operating in Grimsby since 1881, extended their main line over the boundary and along Grimsby Road to terminate at the junction with Poplar Road. Like so many similar tramways at the time, the horses were replaced by electric tramcars, with the new vehicles taking over from 7 December 1901. The tramway continued in private ownership until in 1922, Grimsby Corporation exercised their rights under the Tramways Act (1870) to buy the portion of it that was in the borough. Negotiations took nearly three years to complete, but on 6 April 1925 they paid the tramway company £109,848, and took over 70 percent of the system and 13 tramcars, leaving them just the in Cleethorpes, some tramcars and the main depot. Grimsby converted the Riby Square to Welholme Road branch to trolleybus operation on 3 October 1926, extending it to Weelsby Road, but the main Grimsby to Cleethorpes route remained a joint operation between Grimsby Corporation and the Tramway company.
In 1928, Cleethorpes obtained the Cleethorpes Urban District Council Act (1928), giving them powers to operate the tramway within their area, which would give them time to convert it to a trolleybus route should they decide to buy it. No action was taken immediately, but in 1932 the Tramway company were looking seriously at the possibility of running trolleybuses in Cleethorpes instead of the trams, and reached an agreement with Grimsby that if they converted their part of the joint route between the towns, Grimsby would reciprocate, allowing a through service to continue to operate. Both sides were ready to proceed by 1935, but the Tramway company agreed to sell the remainder of the tramway to Cleethorpes in 1935, and once negotiations were completed, Cleethorpes paid £50,000 for the tramcars, the power station and the depot, taking over responsibility on 15 July 1936. Cleethorpes became a municipal borough on 23 September 1936, and the transport department became Cleethorpes Corporation Transport.
Grimsby had converted their part of the route by late 1936, and began running trolleybuses to the borough boundary at Park Street on 22 November. For the next eight months, the Grimsby part of the route was served by both trolleybuses and trams running over the same section. Cleethorpes meanwhile were converting their overhead wiring, and extending it for a short distance beyond the Kingsway tram terminus to a new turning circle at Bathing Pool on the seafront. Trolleybuses took over from trams on 18 July 1937, and through running between the two systems began. For the opening of the system, the fledgling Transport department purchased ten two-axle rear-entrance trolleybuses from Associated Equipment Company (AEC), to be supplemented a year later by three more. They also installed a turning circle at Park Street, enabling them to run short workings within the borough.
Being a seaside town, Cleethorpes saw a reduction in traffic levels during the Second World War, whereas many towns saw increases in traffic, but were unable to purchase additional vehicles as most of the manufacturers were engaged in war work. Cleethorpes therefore sold four of their trolleybuses to Nottingham in 1940, where they continued in service until 1952. Traffic levels improved after hostilities ended, so they bought four trolleybuses from British United Traction in 1950, and two from Crossley Motors in 1951.