If I arrive at Gatwick,from USA on Norse and have to change to easyjet,is it in the same terminal.
I am not familiar?
Time between is 1 hour 45 minutes
https://www.gatwickairport.com/flights/which-terminal.html
It appears that Norse uses the south terminal while easy jet uses both. I don’t believe there is a way to change terminals airside. So if your easy jet flight is in the other terminal you would need to clear passport control, take the tram and clear security at the other terminal. If you have checked bags then you would need to claim them and recheck.
The time you have is too tight for my comfort.
If I ad to do all that,yes I agree,the stress would be sky high