I noticed when we had a drop in range at 19:49UTC that the BRSX_STAT was in DAMPER_ON and taking itself back to READY. It seems that the wind fence work has been effecting both the BRS's. See plot from last 5 days of BRS states (40=nominal state READY; 30=DAMPER_ON) alongside movement at EX and EY. It's intersting that BRSX kept going on and off Friday evening when there wasn't anything obvious happening.