| Manufacturer | Sector | Year | Accounts type |
|---|---|---|---|
| R.A.PEATEY & SONS LIMITED | Other manufacturing | 1954 | Total exemption (full) |
| DON CONTROLS LIMITED | Computers, electronics and optics | 1960 | Small company accounts |
| MOISTURE CONTROL & MEASUREMENT LIMITED | Computers, electronics and optics | 1968 | Total exemption (full) |
| AUTOLUX LIMITED | Electrical equipment | 1980 | Total exemption (full) |
| MOISTURE CONTROL AND MEASUREMENT (U.K.) LIMITED | Computers, electronics and optics | 1988 | Total exemption (full) |
| DON ELECTRONICS LIMITED | Computers, electronics and optics | 1998 | Small company accounts |