Butterfly loved by Churchill back in England after almost 100 years

Black-veined whites, thought to have died out in 1920s, have seemingly returned due to warmer climate

When they last roamed England in 1925, they counted Winston Churchill as a fan. Now, black-veined whites - an extremely rare species of British butterfly - have been spotted fluttering once again.

Small numbers of the black and white insects have been spotted in fields and hedgerows in south-east London, nearly a century after the species was thought to have become extinct in the UK.