Lastman, show me your information.
https://en.wikipedia.org/wiki/EasyJet_UK
https://www.planespotters.net/airline/Easyjet
161 or 162 Aircraft (slight differences in the info sourse) of the Easyjet Fleet out of 342 is on the G Reg, So about just under half of the Easyjet fleet is on the G Reg.
So after 2022 that means approximately 45% of the Easyjet fleet can only employ UK Part FCL holders when the EASA validations cease to be valid.
Doesn't seem that small to me. Infact as some of the EU Easyjet fleet is on the Swiss AOC, the UK AOC is still Easyjets largest fleet.