I have received reports of Common Darters from Stanwick Lakes (John Windust) and Southern Hawkers near Litchborough (Darryl Sutcliffe). I saw a pair of Common Darters ovipositing into the River Ise in the last week too. Chris Emary also reports Migrant Hawler at Kings Sutton so there are still three species around - typical for mid October.
On 20th, we visited Fermyn Woods Country Park, and despite the 15 degrees C and completely overcast conditions, there were still a handful of Common Darters showing activity around the Reedy Pond and more interestingly 3 Southern Hawkers including an ovipositing female at the Big Pit Pond. The light was too poor for any photography though.