Large White Pieris brassicae
The Large White is found almost anywhere, but is particularly associated with gardens, farmland and allotments where cabbages and other brassica plants grow.
It is the largest of the three common British white species, and is identified by its blacker wing-tips and bolder spots, particularly on the female. Second generation butterflies are considerably larger than first brood individuals.
Adults can be seen on the wing any time from February to November. There are usually two generations a year, peaking in May and late July/early August. In warm summers a third brood may be seen in late September and early October.
Larval food plants include a whole range of brassicas, including cabbages, kale and brussels sprouts.