A very light wind post cold frontal day with fantastic visibility and very nice thermals, but not much above 2300m.  Nigel D and I took off very early, expecting a down flight, but stayed up till we got hungry 2.5 hours later after floating around the valley.  On their second flights, Gwen flew to Barco, and Martin in the other direction to Villafranca.   Very nice evening conditons too.