Commentary on Sections Part 4: Additional Planning Control. Section 127: Preservation of trees in conservation areas
This section applies the protection given by a Tree Preservation Order to trees within conservation areas.  Thus it is an offence to carry out works to a tree within a conservation area unless notice was served of the intention to carry out works to the tree, consent was given, or the works were carried out 6 weeks after the notice was issued and before the end of 2 years from the issue of the notice.