You will need a BSAC medical with a diving doctor approved by BSAC if:

• You tick YES to any of the questions on the self-certification BSAC medical form
• You have had a DCI (bend) treated since you last were certified to dive
• Your health has worsenened recently
• There have been any fitness concerns after your last dive
• You have started regular medication for a chronic illness
• NOTE: BSAC intructors / dive leaders do not need HSE medicals like their PADI equivalents, however it is wise to get a dive medical if you are in charge of others underwater

MDC doctors are Appointed Medical Examiners of Divers (AMED) under the Diving At Work Regulations, 1997.

MDC doctors are UKDMC medical referees.