Triangle Adventure Playground Tree maintenance

We wish to do maintenance on the trees of the Adventure playground to improve health and safety of the trees and the children who play in the area. We also wish to improve the biodiversity of the trees in the Triangle.
We have 37 sycamores under a TPO, which we need to thin out. In doing this it will help get light to the Elder, Dogwood, Wild Cherry, Hawthorn, Blackthorn, Rowan, and Birch saplings we planted earlier in the year.
The maintenance to be done involves removing a couple of sycamores that are over hanging the school playground, thinning several trees that are top heavy and diseased and removing dead wood.
I have attached the in-depth schedule of work.