There are 565 squads and 721 clubs. I too have asked myself this question and made it a lifelong journey of mine to find them. At the age of 71 I went to every squad and club in the whole of England....
Maidstone Swimming Club in Kent is England's longest established competitive swimming organisation - founded in 1844. It was originally founded due to reduce the number of local citizens who drowned...
There are 18 clubs that participate in the county championship with 9 in two divisions. However there are Welsh clubs such as Glamorgan and in the 40 over competition there are 3 divisions of seven....