Go straight to eye casualty. You may have to wait a while but you'll almost certainly see a specialist who will examine your eye there and then.
I recently had an epsiode of flashing lights and many more floaters than usual. Went to the eye clinic and was diagnosed with Posterior Viscous Detachment - it's when the jelly in your eye becomes more liquid with age and starts to detach itself from the inside of the eyeball. There's no cure, the lights and floaters gradually subside and vision is hardly effected. What they watch out for is detachment of the retina as the jelly pulls away from the back of the eye. I had two consultations and that was that. My vison has not been impaired and I was warned that the other eye will probably do the same.
I'm 63 and retired so do not know how this would be viewed from a licence point of view but I imagine it would cause no problems once detachment was completed.