A challenging day with a lot of overcast.  Approaching the pass in a group, along with quite a few other pilots arrived for the pre PWC, it looked as though we were all to land at the Cemetery of Casas del Puerto. However, just as the saddle before the conical hill half of us managed a climb.  Once over in the Avila valley we made steady progress reaching upto 3300m and Wallis, Ken, David,Han and myslef  landed in a SE flow at Avila.  Sunnith, decided to fly back.  On the way back the Cu started to activate and he reached 4500m.  However, approaching the Pass, things started to look problematic with potential Cb’s so he landed with around 80km flown.