I recently purchased a few rewireable Europlugs from a German supplier:
https://www.conrad.ch/de/p/bachmann-900-003-schutzkontaktstecker-kunststoff-weiss-1838753.html
I found the safety instructions they came with quite interesting:

A little over the top for fitting a plug but I guess they are fairly generic and driven by liability laws. I have put the German in as well for Mike (and others?).
Best regards
Roger