| Name | Location |
|---|---|
| X-Mil Network | Edinburgh |
| X-Static Electrics | Worcester |
| Xcel Electrical Engineers Ltd | Macclesfield |
| XShine Cleaning Services Ltd | London |
| Xterior solutions | Portsmouth |
| Xtreme Electrical Contractors Ltd | Mansfield |
| Xtreme Heating & Plumbing Ltd | Burton on Trent |