TCAS Climb,
No, that is not correct RTF phraseology in the UK. The word "behind" is never used in this context, let alone twice! There have been incidents involving jet blast in the past, caused by the use of this word. The correct RTF phraseology is as I have written it above.
ETOPS,
The use of the word "crossbar," instead of "holding point" was confusing. I work at Heathrow Tower, and I have a copy of the notice in my hand. The sentence in question is, "In addition a conditional line up clearance authorises following aircraft to cross the holding point and follow in sequence towards the runway." I have no issue with this procedure.