| SCREENBOND LIMITED | Electrical equipment | 1980 | Total exemption (full) |
| LETCHWORTH PLANT HIRE LIMITED | Repair and installation of machinery | 1992 | Total exemption (full) |
| THE LAMP COMPANY LIMITED | Electrical equipment | 1993 | Total exemption (full) |
| STAYPUT COVERS LIMITED | Other manufacturing | 1995 | Total exemption (full) |
| PEMBERTON TECHNOLOGIES LIMITED | Printing and recorded media | 1996 | Unaudited abridged |
| LEWIS BANKS LIMITED | Motor vehicles and parts | 2002 | Total exemption (full) |
| LINEAR INSTRUMENTS SERVICES LIMITED | Repair and installation of machinery | 2003 | Total exemption (full) |
| HAMILTON BILLIARDS & GAMES CO LTD | Other manufacturing | 2003 | Total exemption (full) |
| TARVER PRODUCTIONS LTD | Other manufacturing | 2006 | Total exemption (full) |