Posted: 20/06/2013 at 20:29
Common Hogweed. My brother and I picked sacks and sacks of this as children for our pet rabbits and mother's dairy goats. http://www.dalswildlifesite.com/thehogweed.htm.
It can sometimes cause a slight skin rash, but nothing to worry about - my arms were often covered with it but it's not harmful.
The flowers are good for attracting pollinating insects, and in the winter it's seedheads look stupendous covered with hoar frost
Don't worry, although a bit similar it's not the Giant Hogweed which can cause much worse skin irritation.