Trees list.
Oak
Beech
Horse Chestnut
Chestnut
Pine
Spruce
Ash
Sycamore
Hawthorn
Poplar
Larch
Elm - also by roads in town
Willow - by water
Weeping willow - by water
Lime
Rowan
Yew
London Plane - in towns
Holly bushes.
Hazel.
Any oriental or foreign trees will work well in parks and gardens.
Others help please...I am not an expert.
We need at least 5 or 6 types of tree as the absolute minimum.