The National Trust asked me sometime ago if I would lead some bird walks for them – this afternoon was the first one. Six people showed up and we had a nice, though rather uneventful walk. The birding highlights for the group being a small flock of Siskin, which flew into the Alders by the Lake and a couple of Little Owl. I was more pleased to see that there were still three Red-veined Darter near the top sluice and, just as we were finishing, a strong passage of House Martin flying west over the Hall. I counted 97 in about twenty minutes. There was also a small movement of Buzzard, involving 6-8 birds, drifting slowly west, at around 2.00 pm.