It's difficult to see the flowers and leaves enough to say for sure.
From what I can see, the flowers look to have 4 petals?
Some leaves look to be alternate, some opposite. Can you take closer shots of the flowers and leaves?
All I can come up with at the moment is something like Cornus racemosa..
http://www.all-creatures.org/p...
https://www.google.co.uk/searc...
