You can’t actually do that, because the tree is fenced off, but if you walk along the diverted path near the tree, please tie a ribbon to the fence. Details here posted on Facebook by Kelly Iles, who got the idea going.
“we’re going to tie yellow ribbons on the fence that Hs2 have put all around the tree it would be amazing to fill the whole fence with yellow ribbons adults children dogs everyone in memory of loved ones no longer here to we need it filled with ribbons
Simply write your name your age and where your from on a yellow ribbon & tie it to the big fence around the tree 🌳”
NB the nearest you can get to the tree is 100m, due to the high fence. The land inside the fence is subject to a High Court injunction, as the red notices tell you.