Selection of young trees / saplings (Low Leighton SK22)

Horse Chestnut x 5 Largest dug out today and just in water.
Oak x 3
Hazel x 1

Inspired by my 11 yr old son's enthusiasm to plant trees to capture carbon, I have been potting up trees and saplings dig up from my gardening work, but we have nowhere we can plant them. Anyone have a home for a tree? Or a suggestion of where we could plant them?