But yes, if you exclude all the civil wars then England had no civil wars during that time period.
Hundred Year War is hardly a civil war existing as it did between multiple countries.
Smaller conflicts like Buckingham's rebellion are excluded much the same ways as I ignored most of these: https://en.m.wikipedia.org/wiki/List_of_rebellions_in_the_Un.... Along with a host of unmentioned smaller slave revolts.
The War of the Roses was is arguable if it’s a civil war. I and many others disagree (see above Wikipedia link).
But yes, if you exclude all the civil wars then England had no civil wars during that time period.