| S.M.S. VENEERING SERVICES LIMITED | Wood products | 1976 | Total exemption (full) |
| C. & T. ENGINEERING LIMITED | Fabricated metal products | 1983 | Total exemption (full) |
| SOUTH WEST INDUSTRIAL FINISHERS COMPANY LIMITED | Fabricated metal products | 1984 | Total exemption (full) |
| ROADCRAFT SAFETY PRODUCTS LIMITED | Other manufacturing | 1996 | Total exemption (full) |
| AVON HYDRAULICS (UK) LIMITED | Machinery and equipment | 2002 | Total exemption (full) |
| MOOR FABRICATIONS (PLASTICS) LIMITED | Other manufacturing | 2004 | Total exemption (full) |
| KPR ENGINEERING (M & E) LTD | Electrical equipment | 2007 | Total exemption (full) |