The collection comprises:
- Signed minute book of board and general meetings, March 1945-April 1947 (BER 1).
- Signed minute book of board meetings, April 1947-March 1948 (BER 2).
- Signed minute book of general meetings, March 1947-March 1948 (BER 3).
The minute books record briefly the activities, finance and share ownership of the company. Very little detail about the operational activity of the company is included. This series of minute books is far from complete. If earlier volumes survive, their location has not been ascertained.