Exotic spider with a nasty bite swarms across England

After years of mild winters, one of Britain's most colorful and striking spiders is on the march. Originally from the Mediterranean, they were discovered in England in 1922 where the climate was just warm enough for them to survive. For decades they clung to the sunnier South Coast but in recent years have been seen as far north as Cambridge. Many conservationists believe their move northwards is linked to our warmer climate since the 1970s.