The technology used in the Lloyds BP11, to measure blood pressure, has passed in a validation study, in a general population, according to a recognised standard protocol, as published in a peer-reviewed publication.
Coleman A, Steel S, deGreeff A, Shennan A. Validation of the Lloyds Pharmacy BP11 oscillometric blood pressure monitor according to the international protocol of the European Society of Hypertension. Blood Press Monit. 2010 Jun;15(3):163-6. doi: 10.1097/MBP.0b013e32833713cf. PMID: 20110808.
ESH-IP:2002 - Pass General population