Clause 9 is critical. Pay attention to:
Notified bodies (certification agencies) will only accept the 2018 edition for new CE/UKCA certificates. Using an older PDF is a major non-conformance.
Distributing unauthorized copies of the PDF is illegal and can result in fines or legal action. Many websites offering "free EN 60204-1 PDF downloads" either provide outdated (obsolete) versions or contain malware.