In 1977 sixteen clubs set up the Minor League, a B Graded competition for smaller clubs and swimmers of larger clubs who were usually excluded from ‘first-team' galas.

Over the years the Organisation has expanded with the introduction of Junior competition and an Invitational Meet, run by and for Member Clubs, providing very low cost individual competition for the swimmers.

Then, in 2006, a proposal to combine with the neighbouring Rother League was put forward and agreed; those galas, including the novel format of a different programme in each of the three rounds, now form part of the organisation.            

The League recognises the various sizes, strengths and facilities of clubs so the format of each competition is designed to accommodate these differences. Although most galas have the usual 6 team arrangement the rules do allow for 5-team galas, so that smaller pools can be brought into use, or 7/8 team galas to be run to obtain optimum use of the many 8-lane pools available. In addition “Postal Swimming” can be included thereby allowing some teams to take part without onerous travel costs.