- Thames CV Services - Hounslow
- TICS International Ltd - Hounslow
- Trinity Fire & Security Systems Ltd - Hounslow
- United Avia - Hounslow
- Universal Dispense Systems - Hounslow
- VENTRONIC IMPORT CO - Hounslow
- Weldwide Services Ltd - Hounslow
- Western Thermal Ltd - Hounslow
Companies 51 to 58
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