This is the formal name of the 'Nuneaton and District Swimming League'. 
Diddy League consists of 3 competitive leagues from within 50 miles of the Nuneaton area. 
Each league competes in 3 galas, with dates published 12 months in advance.  
The competition includes individual races and relays.

At the end of the competition, the top 6 teams from each league, compete in a 'final’s day'
The top 4 teams on the day win promotion. Teams finishing in the bottom 4 are relegated. 

The teams swim in the following age groups:  

•  9 and under  
• 10 and under  
• 11 and under  
• 12 and under  

For this league, age is determined by how old the swimmer is on final's day.
Swimmers must be 9 by this date.