The cache is a 90ml container at the top of pine tree, about 8m up (it was hard to tell), in the bigger of two similar trees.
There is a view across to Canary Wharf from the top.
The D is based on the availability of parking a short distance away that doesn't require you to cross the dual carriageway, and that the tree is quite unambiguous
The T is based on the height of the climb, but that no climbing equipment is needed.