England is in a relationship with someone (it can be anyone, it doesn't matter). That nation, however, does something that ends up hurting England badly. He tries to keep it to himself like he usually does, but France can tell. After all, he has known England nearly their whole lives.

France decides he doesn't much like this turn of events and decides to go have a little talk with England's partner.

Whether England and his partner reconcile in the end is up to you. I would prefer no romantic FrUk in this setting though, just friendship/protectiveness