Regional 1 South East (up until 2022-23 known as London & South East Premier and up until 2016-17 known as National League 3 London & South East) is a level five league in the English rugby union system. It is one of six leagues at this level. When this division began in 1987 it was known as London Division 1. The format of the league was changed at the beginning of the 2009–10 season following re-organisation by the Rugby Football Union while the name change from National League 3 to Premier was introduced for the 2017–18 season to make it more obvious that it is a regional league. London & South East Premier is the highest regional rugby union league covering London and south east England. Following the RFU Adult Competition Review the league was decreased in size from 14 to 12 and the n