Some of Colman's (carrow work etc) records were transferred to the Norwich library in the forum, there also maybe records at unilver. I'm not sure how old this link is but they pointed me in the right direction when I emailed them a few years ago.
http://www.mersey-gateway.org/server.php?show=ConWebDoc.977Unilever Historical Archives
Unilever plc, Unilever Archives & Records Management. PO Box 69, Port Sunlight, Wirral CH62 4ZD.
Tel: (0151) 641 4551
Fax: (0151) 641 4968
Email:
archives@unilver.comCorporate Archivist: Ms J. Strickland
Hours: Monday-Friday 9.30-16.30
Car-parking: Yes
Appointments: Access strictly by appointment only at the discretion of Unilever plc. Applications to consult the archives should, in the first instance, be addressed to the Corporate Archivist, Unilever House, London, giving details of the proposed topic of research.
Records:
Unilever Historical Archives is responsible for the archives of Unilever’s head office departments and its operating companies in the UK. The collections reflect the organisation and global developments of the company, as well as the history of its subsidiaries past and present such as Birds Eye Wall’s, Van den Bergh Foods, Brooke Bond, Colman’s, Lever Brothers, Elida Fabege, United Africa Company, Macfisheries, and Unilever Merseyside. Some material relating to Port Sunlight Village and Bromborough Dock is also held.
Please note that there is very little information of interest to family historians. Also, that Unilever Historical Archives is based in Port Sunlight and London, and potential users will be advised of the location of the documents they wish to consult.
Other Material:
Published and unpublished histories of Unilever and many of its operating companies, biographies of Lord Leverhulme and notable employees, as well as internal publications, in-house magazines, articles and off-prints based on research in the archives and a small number of general texts and reference books on the margarine and soap industries, advertising etc.
Finding Aids:
Computer Database, paper-based catalogues and box lists
