The First Division of the Welsh Football League (currently the MacWhirter Welsh League First Division, for sponsorship reasons) is a football league and forms the second level of the Welsh football league system in south Wales.
If the team which finishes top of the Division has good enough ground facilities, it is promoted to the Welsh Premiership and is replaced by one of the two teams finishing bottom of the Premiership. If the Division champions' ground doesn't meet Premiership standards, then the team which finished second may be promoted. The team finishing in bottom position is relegated to the Welsh Football League Second Division.
Membership of the Welsh Football League First Division, season 2007-2008