You will need to declare this condition filling out the medical application form.
EASA standards should be identical.
Should you fail in one state, you will need to declare it in the next one on the form.
Failure to declare is a criminal offence.
Why not apply to Gatwick in the first place?
You will undoubtedly be referred to a specialist to assess you.
There are threads on this medical section about exactly what conditions are/ are not acceptable.
ABOVE ALL, BE HONEST