VeeoneCUT,
The phrase "cleared ILS" would imply that you can now descend down to the level/altitude specified in the approach plate which is not actually the case. Imagine being told at 20 miles "cleared ILS 27L" at fairly busy LTMA airfield and descending to ..... errrr let me think.... 2000' (hopes).... anyway regardless of actual level it's all gonna get a bit messy.
Please don't quote me , even though i know someone will, but I think most radar controllers would expect you to follow the glide unless told not to. Hence that common phrase "and further with the glide".
Cleared2land@Andrewsfield
oh yeah, like that's a really useful call......