Bat activety in January

Observation - Bat activety in January - UK and Ireland. Description: Today I observed a small bat with small ears flying over a building. The bat was turning and weaving up and down across the roof as if it was feeding. The odd thing was, it was 3 o'clock in the afternoon in January when I would have thought this little ch

Today I observed a small bat with small ears flying over a building. The bat was turning and weaving up and down across the roof as if it was feeding. The odd thing was, it was 3 o'clock in the afternoon in January when I would have thought this little chap should have been hibernating. Also, with it beeing mid winter there did not appear to be any insects to feed on. Is this normal behaviour and what kind of bat is it? It was small with small ears, probably a pipistrelle. Could anyone confirm?