Flues and ducts, ferrous metals in United Kingdom
- Burden Ltd
- Hutcheon Services Ltd
- Wood Group
- James Engineering Construction
- Akramatic Engineering Co. Ltd
- Prodrive Motorsport Ltd
- Alter Air
- Avery Knight & Bowlers Engineering Ltd
- T M P Banham Ltd
- Apex Building Products
- A B Allen Engineering
- Crown Group
- Ardent Duct Work & Ventilation Systems
- Form Fabrications Birmingham Ltd
- Interlock Flexible Products Ltd
- A S Contracts Ltd
- Apex Agencies International Ltd
- Sheet Style Ltd
- Premier Steel Stockholding Ltd
- Rishton Welding & Engineering Co. Ltd
- Micro-Application Packages Ltd
- Willis & Thornley Ltd
- Impress North East Ltd
- Adawall Construction Chemicals
- Adams Sheet Metal Ltd

Metallurgy, metalworking and metal products