Actually, sometimes ATC uses two clicks to acknowledge my "switchoff (or frequency change) approved, and thanks for the service, PH-XXX". I don't think they mean "no" by that.
Also my experience. In fact I've found the two clicks as acknowledgment pretty standard practice, certainly on the continent and in the US. Could it be that - once again - the UK is at a variance with the rest of the world
?
Anyway, easy to remember - if speechless here, just click the other way
