Cuthbertson Laird Group - The UK's leading manufacturer of heavy current and high voltage electrical test equipment.
https://cuthbertsonlaird.co.uk/
Martindale Electric Company Ltd - Martindale manufactures a wide range of electrical test equipment.
https://martindale-electric.co.uk/
Portable Appliance Safety Services - Offers a range of test equipment from Thermometers, 17th Edition testers to Portable Appliance Testing equipment.
https://www.tester.co.uk/