Excellent flying, but limited to the central Dales area - on all sides the cloudbase dropped by a huge 2000' (spectacular if nothing else). It (seemed) like a combination of powerful sea breeze encroachments from E and SW augmented and held by strong convection over the central high moors. So boxed in basically and even the planned triangle couldn't stray far enough from the area that worked. Still… Rare to get 2000' near walls of cloud and pretty awesome to look at.