Which Bat Species?

Which Bat Species?

Observation - Which Bat Species?. Description: I feel I have been committing mass murder ! Unaware of these two inhabitants, I have been putting my moth trap in an open fronted outbuilding with an electricity supply. Went to check last night and was confronted with two bats (bodies very approx. 8 - 1

I feel I have been committing mass murder ! Unaware of these two inhabitants, I have been putting my moth trap in an open fronted outbuilding with an electricity supply. Went to check last night and was confronted with two bats (bodies very approx. 8 - 10 cm) flying around. They took cover quickly high in the rafters.
This indistinct photo was taken with a zoom lens today. Further investigations revealed a mass of moth wings (but no droppings) under their roosting spot. Oh dear. Moth trap will be moved pronto.