If you have the following medical conditions, then we would require a signed medical certificate from your doctor to say that you are fit for diving. We would also need to see proof that you have valid dive and medical insurance, and both include emergency evacuation. Asthma in the last ten years Diabetes Thyroid disease or no Thyroid Use Anti-Depressants High blood pressure   *If you feel there are other medical reasons that could potentially affect your diving then please let us know in advance so that if we need to make special arrangements we can.