Looks like that leaves us with just the lack of a CE Marking in the EU. http://www.westminster.gov.uk/services/business/healthandsafety/health-and-safety-a-z/ce-marking/ To sum up where we are regarding stress tests and the use of e-meters on the public: The MHRA are not interested in the e-meter as they do not regard it as a medical device. The GMC are not interested in "stress tests" as they do not regard it as practising medicine. It has been reported as false advertising to the OFT but I do not think it is one of their priorities. But we DO have the missing CE marking to go on (if it needs one). Writing in to your local OFT where you see stress tests might help move it to a higher priority. I have taken up this issue about the missing CE marking with the CoL and also pointed out that when they use it it is sometimes plugged into the power supply during use to replenish the batteries and that without a CE marking it could be dangerous. I gave them the above link. We'll see how it goes. It is possible that the e-meter does not need a CE marking in which case all that is left is sending complaints in to the OFT for misleading advertising and doing the usual demonstrating where they are holding stress tests. Edit: I've found the relevant legislation and they do not need a CE marking for the e-meter as a "measuring device" nor as "low voltage electrical equipment". I am looking at the packaging of a USB webcam and that has a CE marking on it. USB ports have a 5V supply so it should not need one but maybe it has one because it can be used as a toy by under 14 year olds. Looks like we just have the OFT to send letters to and the rest has to be done by picketing the stress test tables.