Mitre owns and operates a comprehensive database of companies located in central England. They have been collecting and maintaining data since 1980 throughout the county.
 
Every January, Mitre produces the 'Northampton Business File' and in June, The North Northants Development Company (NNDC) Business File covering Wellingborough, Kettering, Corby and East Northants. The directory format includes company listings for non-retail businesses and maps of all Industrial Estates.

Their Goal ...

"is to provide a quality local business to business directory with a free distribution to all companies listed in it, keeping the local business community in contact with each other and providing the opportunity for cost effective advertising."

If you would like a copy of the The Business File, please contact Mitre Publications on 01908 630300. Copies can also be purchased online   
 
In addition, the data also appears as a searchable database at The business file website