Specialists have advised that an upper branch of the Major Oak in Sherwood Forest should be reduced after it was found to be at risk of falling and potentially damaging other parts of the ancient tree.
The latest work follows the loss of a branch from the Major Oak in August, two months after experts confirmed that the tree had reached the end of its life.
Visit Sherwood Forest said arborists and tree health experts were consulted following the August branch loss, which came after a particularly warm summer.
Assessments identified an upper branch considered to be at risk of falling away. Specialists advised reducing the branch in an effort to protect the remaining structure of the tree.
The work is complicated by heavy iron supports installed around the Major Oak during the 1900s, meaning changes to the tree need to be carried out gradually and with particular care.
Visit Sherwood Forest said the intervention was intended to keep the remaining structure stable and intact for as long as possible, while also protecting the wildlife habitat provided by the ageing and decaying tree.
Experts confirmed in June that the Major Oak, which is estimated to be up to 1,200 years old, had reached the end of its life after it failed to produce leaves during the spring. The tree had been in decline for several years despite work by the RSPB and tree and soil specialists.
A large limb then fell from the tree in August. At the time, specialists said structural changes and further branch losses were expected as part of the natural ageing and decay process.
Visit Sherwood Forest said further branch loss is likely over the coming months and years and that the appearance of the Major Oak will continue to change.
The remaining tree will be retained at Sherwood Forest for as long as possible. Even after its death, its trunk and branches continue to provide habitat for wildlife as the wood gradually decays.
The Major Oak stands at the heart of Sherwood Forest National Nature Reserve near Edwinstowe and has long been associated with the legend of Robin Hood.
