The story
As part of the privatisation of British Rail, the Regional Railways North East franchise was awarded by the Director of Passenger Rail Franchising to MTL after it won the contest from a field of Connex, FirstBus, Grand Central, a management/Via-GTI consortium, National Express, Prism Rail and Stagecoach. The franchise commenced on 2 March 1997.
In May 1998, the franchise was rebranded as Northern Spirit with a livery of turquoise with a lime green stylised italic N across the midsection introduced.
At the same time, the long distance regional services connecting Sunderland, Newcastle, Scarborough and Hull with Manchester, Liverpool and Blackpool were sub-branded under the TransPennine Express banner with rolling stock painted in a base colour of maroon with a gold stylised italic N across the midsection. These services would later become a franchise in their own right from 2004, which is currently operated by TransPennine Express.
On 18 February 2000, MTL was purchased by Arriva, and on 27 April 2001 the franchise was rebranded as Arriva Trains Northern. The Arriva corporate turquoise and stone livery was introduced on refurbished 153352 in July 2001.
From Wikipedia’s article on Arriva Trains Northern, shared under CC BY-SA 4.0.3