Is it really that bad to say you are "ready for departure in turn" when at the hold and ready for departure behind other aircraft?
It may not be CAP413 standard phraseology but at least you're letting ATC know that you're aware of the other aircraft waiting and not trying to jump the queue?
I think we use it more at my home airfield as the FIS guy sometimes gets shirty if we just say "ready for departure" when there are other aircraft waiting at the hold. Maybe I should adjust my language and suffer the wrath..?