I found it on the South Tower Feed, at about 2-3 minutes in.
Basically Tower told BAW279 to hold short RWY 25R at P.
BAW replied without giving the RWY.
then was asked to say the full instruction including the RWY 25R
he then said it again without the RWY 25R included ,
Which the controller replies with "Can i get it all together Speedbird 279 Heavy with the callsign Hold shorts Runway 25R, Read that back for me"
The BAW finally gets it an complies with the full correct read back.
It happens alot with pilots not giving full read backs and its good the controller pulled him up and insisted he gives the full read back.
Not every controller does it however it could save the controllers behind as well as others if the full read backs take place.