A Painted Lady Summer?

Yesterday's sun brought unexpected - and very welcome - visitors to the garden: several Painted Ladies, newly arrived no doubt from North Africa, nectaring hungrily on Ceanothus in the back garden and a white-flowered evergreen whose name I can never retain in the front. At one point two of them started a fight and flew off at high speed in chase of each other - they are extremely strong fliers; they have to be to make their great migration. The Painted Lady is (as the name suggests) a showily marked and easily recognised species, and most summers, if you keep your eyes peeled, you'll probably spot a few. But some years they reach these shores in great waves and can turn up anywhere - I once saw one battling gamely with gusty winds right under Hadrian's Wall. Tomorrow's early sightings give me hope that this might be a 'Painted Lady summer'...