TruXta
One thing to be wary about is bastards cutting the tree down on a Sunday or a bank holiday, regardless of preservation orders. Unlike demolished buildings, fully mature trees can't be replaced.
This happened at my old house: there was a black poplar in the back garden of a nearby house. Black poplars are one of the most endangered native trees we have. It was mature, and home to many birds and other creatures. The sound of the wind sussurating through the leaves in summer was not only a lovely background noise but also masked household noises from all the gardens and open windows and back doors. And it was an important sump for water in the area too. So the developer just came in on a Bank Holiday Sunday and chopped it down. I went over there to complain and he basically laughed in my face. His team finished the job on the Monday. He built a horrible extension on the house (the tree wasn't anywhere near the building, it was further down the garden) and filled it with braying incomers who sat on their illegal first floor terrace shouting about rugby and what they did to their girlfriend last night.
And the house he renovated developed some kind of subsidence type problems because of ground heave because there was suddenly a lot more ground water. Several other houses had the same problem. This was right over the Effra so the ground was sometimes saturated.