Hi Alister,
may be worth a search on this forum using the search term "migraine" as the subject has been dealt with before.
I'd be interested in who diagnosed "migraine." You, your GP , a neurologist?
The reason I ask, is that the term "migraine" is often banded about, without the prescence of a firm diagnosis.
I'd expect that the authorities would be more interested in migraine which involves neurological symptoms, such as visual disturbance, strange sensations in the limbs, appetite changes, rather than the "migraine" that my wife claims to suffer when I have had too much beer!
Keep us posted, let us know when you've made your first solo circuit, our advice on this forum is lead by others experience.