Red admiral butterfly population soars 400% in UK as winters warm

Sightings rise to 170,000 so far this year as climate breakdown changes behaviour of species

Red admiral butterflies are enjoying a 400% boom in British gardens this year, data reveals, as the migrant insect favours the warmer climes brought by climate breakdown.

Butterfly Conservation has reported 170,000 sightings of the majestic red and black insect so far this year in its annual Big Butterfly Count.