A related idea is that mutual dependence can bring parties together who otherwise are not on speaking terms.
You have two sets of officials, hardly ever on speaking terms, with great rivalry between them.
We fundamentally disagree on the issue, but the fact that we parted on speaking terms says a lot for both of us.
Indeed, there are often people on one side of an issue in a referendum who are hardly on speaking terms with each other.
Some of them would not be on speaking terms if they did meet.
I am sure it is a good thing for people concerned in these great affairs to be on speaking terms.
However, in that case would not the answer be for the borough councils to get on speaking terms?
I was not on speaking terms with him.