| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Anti-Sonics Ltd | 01479034 | 13/03/2000 | Dissolved |
| Cheercrave Limited | 02619837 | 26/06/1991 | Dissolved |
| Cheercrave Limited | 02619837 | 31/12/1991 | Dissolved |
| E.D.C. Acoustic Engineering Ltd | 01328116 | 09/04/1998 | Dissolved |
| Hodgson & Hodgson Services Ltd | 01595939 | 17/11/1992 | Dissolved |
| Hodgson Fabrication Services Ltd | 03552612 | 30/09/1998 | Dissolved |
| NEVILL THOMPSON LIMITED | 01217517 | 25/04/1997 | Dissolved |
| NOISCO 2009 LIMITED | 00984200 | 13/03/2000 | Dissolved |
| NOISCO PRODUCTS LIMITED | 03552717 | 30/09/1998 | Dissolved |
| Noise Control Engineering Ltd | 03552599 | 30/09/1998 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ACOUSTIC DESIGN CONSULTANTS LTD | 01618335 | 09/04/1998 | 08/07/2015 | Dissolved |
| APPROVED ACOUSTIC APPLICATIONS LIMITED | 06113356 | 20/04/2007 | 08/07/2015 | Dissolved |
| ECOMAX ACOUSTIC PRODUCTS LIMITED | 02012998 | 13/03/2000 | 08/07/2015 | Dissolved |
| ECOMAX ACOUSTICS LIMITED | 01540035 | 10/06/1993 | 08/07/2015 | Dissolved |
| H & H Contracting Ltd | 02904918 | 04/03/1994 | 13/01/1997 | Dissolved |
| HODGSON & HODGSON GROUP LIMITED | 01574452 | 17/11/1992 | 08/07/2015 | Dissolved |
| HODGSON & HODGSON LIMITED | 00139425 | 17/11/1992 | 08/07/2015 | Not Trading |
| KEITH YOUNG INSULATION LIMITED | 02274836 | 01/07/1991 | 31/12/1991 | Not Trading |
| KITSON'S THERMAL SUPPLIES LIMITED | 00838772 | 25/08/1991 | 31/12/1991 | Not Trading |
| THE NOISE CONTROL CENTRE (MELTON MOWBRAY) LIMITED | 03785579 | 13/03/2000 | 08/07/2015 | Dissolved |