I've not done as much as I should but....
Strapped one AudioMoth to a derelict barn for 5 night. Files were run through BatClassify to flag interesting files which were then looked at using Spek. Initially came up with greater and lesser horseshoes and common pipistrelles. We then spend an evening with a Petterson M500, Batbox Duet and a Echo Meter Touch which confirmed the findings from the AudioMoth in addition we picked up Serotine and Noctule.