Thanks for the reply. In the two examples I linked there was no mention of training. People were required to already have the skills required to do the work.
I agree that those 2 examples are in the wrong. Especially the first one. Experience should never be a requirement for an internship, and a '1 day trial' is absolutely ridiculous for an internship.
Unfortunatly the examples are the rule and not the exception here from the jobs I have seen advertised. Internships (in Ireland) are pretty much seen as "work for me for nothing" rather than any kind of learning experience.