TCAS Climb
ATCO Two is quite correct in his assertions on the UK RTF (as usual). The use of "behind the XXX line up behind" infers that you may enter the runway behind the aircraft on the roll, something which could have dire consequences if the previous departure is heavy and you're not... Now, not everyone is stupid, but there are some out there who ain't the full quota, we've all met them and the UK phraseology was devised by our dear old SRG to remove any ambiguity from the conditional clearance.
Whilst you may not agree with it, or the UK having it's own procedures, semantically speaking, there is a difference.
