I think that the significant post-Tenerife change was to replace "take-off" with "departure" in all cases except for the purpose of issuing and acknowledging a take-off clearance. It seems that this was (possibly mistakenly) extrapolated by UK Mil pilots to delete the word "Clear" from their responses. Whilst many of us were taught (or more likely just adopted) the technique, it has certainly been incorrect for many years and I am curious to know if it ever was stipulated by JSP318A.