Winter Moth (Very worn)
There are two species of winter moths; Winter and Northern Winter. In both species the female is wingless and the adults contain anti-freeze that enables them to survive sub-zero temperatures. It's likely there was a female wafting her pheromones into the night air that drew in the numbers we found this evening.
Blue Tits time their breeding to coincide with the emergence of Winter Moth caterpillars in the spring.
If you are out driving tonight keep and eye out for these small whitish moths.