Use “Look for earlier events” to see lists of WLP, SLPC and PSE(LG) events back to 2011. Note that these archives are more easily accessible on the respective group’s own site.
WLP, 2011/06/04-2015/06/06 (including SLPC, and WEA Richmond in 2011):
SLPC, 2011/08/07-2016:
PSE(LG), 2011/01/31-2013/11/19: