Among epileptic patients, 70% are effectively treated with drugs and live a generally normal life, but the other 30% are resistant to these drugs. Some can get around this by having invasive surgical procedures. Yet despite progress of the last 30 years to improve epilepsy treatment, the percentage of patients who cannot be treated remains at 30%. One of the most debilitating aspects of epilepsy is the uncertainty of when a seizure will occur – even if they are as infrequent as two a year. If you don’t know when the seizures will come, you cannot know when you are safe. Professor David Grayden wants to predict the onset of seizures, which could change the lives of over 15 million people.