(Pat Kiewicz) wrote in message ...
Neil said:

No, the leaves are more obviously serated on the edges, and the berries are
a bright blue.

Possibly common buckthorn ( Rhamnus cathartica)?

http://www.nps.gov/plants/alien/fact/rhca1.htm
http://tncweeds.ucdavis.edu/esadocs/franalnu.html

I think you're right. It's buckthorn. My contractor was wrong.