Not every one is aware that there are two types of preservation orders on trees. To have a full preservation order a tree has to be rather special, rare, fine specimen, historical. preservation area etc. I have just looked up mu address on the council web site and there are no individual trees preserved within a mile of me, there are 4 areas of woodland that are preserved. If you think you have a preserved tree, go onto your council web site, your will be able to enter your post code and it will show you on a map.
The other type of preservation is applied to new developments where the developer must not remove specific trees, but that only applies to the developer not subsequent owners. In fact developers seem to have accidents on site that means those trees are damaged beyond recovery, all they then have to do is plant replacements. A very recent development behind our house had about 10 trees marked for keeping, every one was eventually damaged.