UK gets:
-0,05 parlament
-0,03 DotF
-0,05 Innovative
=
-0,13 per month
Desire for peace
+0.01/month
Enemy gets:
+0,1 100% ports
+0,5 * x% of provinces with core sieged.
Desire for peace
+0.01/month
So, UK can offset +0,13, or 13 stacks of Desire for peace, before War ex starts to rise. (1year and 3 month
When enemy is at +0,23 (9 month for 2 war ex = 75/9 = 8+ dip power per month needed fo offset)
-----
Atfer 8 month:
UK +0,21(10 month for 2 war ex = 75/10 = 7+ dip power per month needed fo offset)
EN +0,31(7 month for 2 war ex = 75/7 = 10+ dip power per month needed fo offset)
----
Atfer 15 month:
UK +0,28 (7 month for 2 war ex = 75/7 = 10+ dip power per month needed fo offset)
EN +0,38 (5 month for 2 war ex = 75/5 = 15+ dip power per month needed fo offset)
----
Atfer 20 month:
UK +0,33 (6 month for 2 war ex = 75/6 = 12+ dip power per month needed fo offset)
EN +0,43 (4 month for 2 war ex = 75/4 = 18+ dip power per month needed fo offset)
----
Atfer 24 month:
UK +0,37 (5 month for 2 war ex = 75/5 = 15+ dip power per month needed fo offset)
EN +0,47 (4 month for 2 war ex = 75/4 = 18+ dip power per month needed fo offset)
Now, UK normally has only accept culture in lategame.
Both sides can use dip power for reducing, were UK should have advantage, because they do not need to focus mil power.
And your Enemy had +0.1 war ex since the start of the war, so he should already run low on dip power