The Welsh Rugby Union Division Four South East (also called the SWALEC Division Three South East for sponsorship reasons) is a rugby union league in Wales.
During the course of a season (which lasts from September to May) each club plays the others twice, once at their home ground and once at that of their opponents for a total of 22 games for each club, with a total of 132 games in each season.
The team who is declared champion at the end of the season is eligible for promotion to the WRU Division Three South East.
The two lowest placed teams are relegated to the WRU Division Five South East.
[1] The initial three year sponsorship was extended at the end of the 2010/11 season, making SWALEC the league sponsors until 2015.