The invention relates to a bone plate assembly for use in orthopaedic or trauma surgery. The bone plate assembly includes a plate member having a top side and a bottom side at least one passage extending from the top side to the bottom side； wherein the at least one passage includes a first bore with a first end open towards the top side and a second end, a seat portion configured to receive the head of the bone anchor； and wherein the first bore comprises a first central axis and the seat portion comprises a second central axis, and wherein the first central axis and the second central axis intersect each other within the passage； and a second bore open towards the bottom side.
