Butterflies migrate to Britain's warm weather

Foreign species of butterfly are invading the UK as a result of global warming.

Rising temperatures mean butterflies from Africa and Spain are now able to survive in our climate.

Some species, such as the clouded yellow, are setting up home here permanently because they can survive our mild winters.

David Roy, the head of monitoring at the Centre for Ecology and Hydrology, said: "Temperatures seem set to continue to rise, so I don't see this influx stopping."

Scientists say global surface temperature could rise by up to 2.5C in the next 50 years, compared with a rise of just 0.5C during the entire 20th century.