I received an email from John Windust. who saw and photographed Common Blue Damselflies at Stanwick Lakes on 30 April, at around the same time I saw a couple at Ditchford Lakes. That makes 6 species for April.
Elsewhere, Common Blues and Hairys have been reported from Summer Leys and Banded Demoiselles from the Nene at Kinewell Lake in Ringstead.
Here are a couple of Female Hairy Dragonflies that I found emerging at Ditchford. on 30 April.