The BTO kindly sent me the results of three further O.S. grid squares today.
On the nights of 11, 15 and 21 August, the detector was set in and around Goose Common. This was habitat for Common and Soprano Pipistrelles, and Brown Long-eared Bat. In addition Natterer's and Serotine were recorded along a grassy ride between patches of oak-hawthorn wood. The garden of nearby clay-lump cottage produced a large number of recordings of Common Pipistrelle, suggesting a roost.