MATS 1 says:
When line-up will take place at a position other than for a full-length runway departure the intermediate holding point designator shall be included in the line-up instruction.
Controllers may include holding point designators in any clearance to line-up as
considered appropriate.
At LL - it's always used no matter where you're going from just to improve situational awareness and also as a last-line of defence against saying the wrong callsign or something similar.