Dear Steve
The company you are looking for is called "Landmark Information Group Ltd". They have a database of OS maps that go back to the 1860's, and produce environmental assessments of areas that may be potentially contaminated.
They have the following data products :-
- Envirosearch - designed for the property professional, who is dealing with or valuing an individual domestic property.
- Sitecheck - designed for a practitioner acting in a commercial transaction
- Sitesearch - recently acquired as a result of buying ICC
Landmark are based in Exeter, and their contact details are as follows:-
The data that Landmark produces is primarily 'Raster' (ie like a photocopy) but there is also 'Vector' data available (ie scaleable). If you want 'Vector'GIS data for the London area, I suggest that you visit the
Association for Geographic Information website.
cheers
Micky