Hadrian's Wall was damaged when the Sycamore Gap tree came down, analysis finds
The preservation group Historic England says it passed news of its analysis on to Northumbria Police, which has now made at least four arrests linked to the case.
The shocking act of vandalism that brought down the famous Sycamore Gap tree in northern England also damaged Hadrian's Wall, which once marked the ancient frontier of the Roman Empire.
Archaeological analysis of the damage confirmed "there, a government-backed organization that preserves the country's heritage.
