Having watched hundreds of aircraft take off from LPL whilst listening to comms from tower - pilot, It is a fairly regular thing to hear the pilot say "ready on reaching" as he approaches the holding point short of the rwy.
I have also heard the ATCO ask the pilot "are you ready for immediate departure?" this is often when there are aircraft on finals to get the departure off the ground sooner rather than later.
I am aware that LPL is under certain jurisdiction from Manch, there is usually a delay between each IFR departure as dictated by Manch.