Locals and tourists mourned the loss of one of Britainβs most photographed trees, which stood for hundreds of years in a dip in Hadrianβs Wall. The police said they had a suspect in custody.

The felled tree at Sycamore Gap, beside Hadrianβs Wall, on Thursday. The authorities said they had arrested a 16-year-old boy in connection with what they described as an act of vandalism.