|Scope||1898-2012: project files, drawings, photographs, Ordnance Survey sheets, and microfilm|
|Repository||Collection held privately: enquiries to The National Archives, Archives Sector Development|
|NRA catalogue reference||NRA 44895|
Where reference is made to an NRA number, a catalogue is filed in the National Register of Archives and you can consult it at The National Archives.
For opening times see the Visit us section.