Only if appointed to do so by the Health and Safety Executive (HSE).  Under the Ionising Radiations Regulations 2017 medical surveillance and any associated medical examinations can only be carried out by an 'Appointed Doctor' or 'Employment Medical Adviser' (definitions of which are in Regulation 2 (1)).  To be appointed by HSE, you must be a registered medical practitioner with a licence to practice who holds as a minimum a Diploma in Occupational Health and has undergone appropriate training specified by HSE and takes part in Continuing Professional Development as required by the General Medical Council. Information for doctors (and employers) and a list of appointed doctors is available at www.hse.gov.uk/doctors