Cropico, Ltd.
Cropico manufacture microhmmeters, decade boxes, temperature sensors, digital ohmmeters and cable testers. Leaders in precision measurement
http://www.cropico.co.uk/

T and R Test Equipment
T & R Test Equipment Ltd manufacture a broad range of test equipment for the global electrical supply industry. the range includes relay test systems, current injection systems up to 6000A and high voltage systems up to 100kV.
http://www.trtest.com/