Bookworm has helpfully done this already, see post #25 in this thread. The reference to Basic Regulation is document (EC) 216/2008 available here:
EASA - Regulations structure
That is thousands of pages. No wonder people are going around in circles.
Reading
216/2008, this doesn't say that N-reg FAA PPL/IR pilots based here will need to get EASA PPL/IRs.