Too hot for much birding! A Hobby flew over the pool at the start of our GBC outing today. A few juv Whitethroats seen, Willow Warbler & Chiffchaff, Reed Warbler, 3 Heron. Lots of Red-veined Darters along E pool shore, plus Black-tailed Skimmers, Emperors, must have been thousands of Common Blue Damselfly, plus Blue-tailed.