Global heating brings Mediterranean butterfly to the UK

Long-tailed blues and eggs seen in large numbers but are unlikely to survive the winter

A fast-flying migratory butterfly from the Mediterranean is appearing in large numbers across southern England this summer as a result of global heating, experts say.

More than 50 long-tailed blues and hundreds of the butterfly's eggs have been discovered in recent weeks, which is likely to result in an unprecedented emergence of the butterfly in Britain later this autumn.