The factories concerned employed 3,300 staff in seven places in England (Anston, Guildford, Scarborough and Wigan), Scotland (Falkirk) and Northern Ireland (Belfast).

[7][8] Plaxton's Scarborough operations was planned to close on 3 May 2001[9] with the loss of 700 jobs blamed on the fall in tourism after the foot and mouth epidemic broke out.

[12] The following month Mayflower was placed in administration, amid accusations of four years of falsifying crucial company records as to customers' payments to HSBC, counting the same income twice.

[15][16]A group of Scottish investors, Noble Grossart, David Murray, Brian Souter and Ann Gloag, purchased the business from administrator Deloitte in May 2004.

[42][43] In August 2020, Alexander Dennis announced plans to cut 650 jobs from its UK manufacturing sites including Falkirk, Scarborough and Guildford, citing a demand drop due to the COVID-19 pandemic.

[45][46] June 2021 saw Alexander Dennis open a base in Ballymena, Northern Ireland, which was described by local media as "boosting economic growth".

[47] In July 2021, Alexander Dennis announced plans for construction of a new staff office complex and museum in Farnborough, Hampshire named Trident House.

[51][52] After building a batch of Enviro400FCEV buses in a pilot scheme at the site in 2022, Alexander Dennis announced it would expand its Larbert headquarters by converting on-site warehouse space to bus manufacturing facilities.

Production of the second-generation Alexander Dennis Enviro400EV is planned to begin at Larbert from August 2023, taking the company's manufacturing footprint in the United Kingdom to three sites.