Get set for a painted lady summer: big year for orange butterflies in Britain

Migrant insects have been seen in large numbers along east coast thanks to heatwave and benign southerly winds

If you've spotted a pale orange butterfly dashing at frenetic pace through streets, fields or gardens, you've noticed the new migrants that will add colour to the summer in record-breaking numbers.

What is expected to be the largest arrival of painted lady butterflies in Britain for 17 years is under way after heatwaves and favourable winds ushered thousands if not millions of the insects northwards.