Be very careful with limitations on your medical, last thing you want is getting denied a Class 1.
Now I know I’m quoting US regulations but it’s ICAO and they generally don’t differ by that much, I’ll leave it to you to find the UK CAA equivalent:
No other organic, functional, or structural disease, defect, or limitation that the Federal Air Surgeon, based on the case history and appropriate, qualified medical judgment relating to the condition involved, finds -
(1) Makes the person unable to safely perform the duties or exercise the privileges of the airman certificate applied for or held; or
If you have a functional limitation that makes you unable to perform certain times of the day…
I know it’s a stretch but there is room for interpretation that could go against you.