Well that is an interesting turn around Final 3 Greens from:
No, if you read it again, it is totally consistent.
As an A/G licence holder, it is not so much that I do not care, as I am not allowed to do anything other than pass on certain information.
I can pass them traffic information, which renders the ambiguous 'roger' redundant, woudln't you agree?
While we're at this, I have looked up on 'take off at your discretion' in CAP413.
It seems to me that this is a clearance to enter the runway (not take off, I never suggested that), since an AFISO appears to give taxi instruction to a holding point and then once this phrase has been used, the pilot must then judge whether a departure can be made in compliance with the rules of the air.
Maybe an AFISO will correct me if I have misunderstood this point, as I say I hold only an AGCS r/t licence.