- A H Engineering North East Ltd - NE31 1SP
- A&P Group Ltd. - NE31 1SP
- Bill Quay Precision Engineering & Fabrications - NE31 1EH
- Durham Filtration - NE31 1UB
- Elite Enclosures & Fabrications Ltd - NE31 1BJ
- Industrial Temperature Sensor and Heating Elements (ITH) Limited - NE31 1EH
- Kenneth James Ltd - NE31 1UB
- Laminform Ltd - NE31 1UB
- Lane Plastics Ltd - NE31 1BJ
- Northeast Thermocouple Sensors - NE31 1UB
- Northern Cranes & Lifting Equipment Ltd (t/a Norcrane) - NE31 2XQ
- Secure Electronics Ltd - NE31 1SF
- UK Asbestos Specialists Ltd - NE31 1SR