In the UK, the official version is BS EN 60204-1:2018+A1:2025 , available from the BSI Knowledge Centre. In Ireland, the same document is available from shop.standards.ie. Other national bodies like NEN (Netherlands), AFNOR (France), DIN (Germany), and ANSI (USA) also sell the standard.
Searching for a free is common, but it comes with significant risks. Here is why you should always use the official version: en 60204-1 pdf
Must have a manual mechanical switching device with clear "0" (OFF) and "1" (ON) positions. In the UK, the official version is BS