Daniel Graham and Adam Carruthers are accused of going on a 'moronic mission' in the middle of the night to fell the iconic tree

There was national outcry when the Sycamore Gap tree next to Hadrian's Wall was felled last year

The Sycamore Gap tree was felled in late September, and the police investigation is ongoing

The 69-year-old man was the second person to be arrested after the iconic tree was cut down last week

Police have revealed a man has been arrested in relation to the felling of the famous Sycamore Gap tree.

Police said the teen is assisting them with their enquiries.

The Sycamore Gap tree next to Hadrian's Wall in Northumberland National Park has been 'deliberately felled' overnight