Hmmm.... Really need a bigger picture. Not sure about the leaf shape.
Is it just me or does that look like small giant hogweed. Difficult to tell.
This is normal hogweed.
http://www.bushcraftuk.com/forum/showthread.php?t=86953&page=2&
This is the key for giant hogweed.
large plant, often over 2.5 m high (when mature)
flowers in umbel shape, larger than 15cm in diameter
flowers have more than 50 rays
hollow stems are between 3-8 cm in diameter
stems have stiff white bristles
stems have spots or blotching, red or purple in colour
large, lobed leaves up to 1m in size
leaves compounded in three