A person called for medical examination may be accompanied by his or her medical certifier. The medical certifier is notified of the date, time and place of the examination and invited to be present if he or she so wishes. In practice, however, it is rare for medical certifiers to be present at such examinations.
Requests are sometimes made for the attendance of another person at a medical examination, for example, a relative of the person being examined. Normally, such requests are made in advance of the examination and the medical assessor uses his or her discretion in deciding where such attendance would be appropriate in the circumstances. I am not aware of any particular difficulties with these arrangements.