The Messenger archiving project began in earnest 2000 when Dr Roland Karlman of the Ellen G White Research Centre at Newbold College, Bracknell, arranged for Newbold College Library's holdings of the Missionary Worker and the Messenger to be digitally scanned. The British Union Conference of Seventh-day Adventists is grateful to the following people for their work in making this archive available to the public:

Dr Roland Karlman, Ellen G White Research Centre at Newbold College of Higher Education, former Director.
Dr Radisa Antic, Ellen G White Research Centre, at Newbold College of Higher Education, Director.
Mr Per Lisle, Roy Graham Library, Newbold College of Higher Education, Librarian.
Mrs Lynda Baildam, Roy Graham Library, Newbold College of Higher Education, Associate Librarian.  

The files are now included in the comprehensive Adventist Periodicals archive maintained by the Offices of Archives, Statistics, and Research (ASTR).

Note that the Messenger, also known as the British Advent Messenger, began in 1936, but its predecessor, the Missionary Worker ran from 1902 to 1935. The archives are available and searchable from the links below:

British Advent Messenger (1936-2016) (note that as of March 2022 the years from 2002 to 2011 have yet to be uploaded)

Missionary Worker (1902-1935)