Bizzare theories are swirling tonight over why the world famous Sycamore Gap tree, which appeared in Kevin Costner's 1991 film Robin Hood: Prince Of Thieves, was chopped down in the middle of the night, as a 16-year-old boy is quizzed by police. The much-loved landmark at Sycamore Gap, next to Hadrian's Wall in Northumberland. Mystery surrounds how the damage could have been done, with some theorising that 'a professional who knew where they were going to cut' was responsible, perhaps requiring a torch to complete the job at night. It is possible the perpetrator would have required an accomplice to...