If they were talking about Europe as a whole,. then that's pretty much the case. If it was specific to the UK, then someone was telling you 100% grade A bullplop
NEW bottles sold must be CE-certified, as marked with a pi symbol. Existing HSE bottles are legal until the end of their service life (typically 10-15 years.)
If you're playing in Europe (outside the UK) then bottles should be CE-approved, whereas before there was a proper European standard it seemed to be a matter of "anything goes, as long as it's within test."