The tree, which is usually 20 to 25 m (70 ft) in height and anything between 50 and 60 years old, is then shipped free-of-charge across the North Sea to Immingham by DFDS Tor Line.
This year, four people have been killed after livestock accidents, three have died after falling from a height, two where machinery was involved, one from drowing and one in a tree-felling accident.