Clogs,
Good advice on getting it checked out - epilepsy can be a life-terminating affliction (in the bath or in the air...)
As for a definite history of seizures, in my opinion that does not mix with flight instruction - put yourself in the shoes of an ab-initio student with an unconscious instructor!
The NPPL proposal I was talking about had 10 years free from seizures and a medical assessment of minimal risk of recurrence (Group 2 driving standard) before allowing the carriage of passengers.
Sorry I can't be more positive on this one.