Further to my post in reply to Sunbeam:
I have looked up the rules for the Middlesex League. They certainly award a trophy for the highest aggregate, but the basis on which the league is run is a bit ambiguous. I can see how Sunbeam gained the impression that this is an aggregate competition run on a cumulative basis. If that is the case then to describe it as a “league” is something of a misnomer when it is in fact an average based aggregate competition.
Rutty