Dunno, don't do Essex, was just making a general point.
Traffic information is two way though, I guess the heavy driver as he hits TOGA won't mind being told that he's got a Cherokee coming in to his 12 o'clock at half a mile one thousand feet above. Of course he won't be thinking "shut the **** up I'm busy enough and why have you put conflicting traffic right in front of me anyway?".
Okay so it may not be a regular scenario but that is not in itself justification for setting it up. Would you give VFR traffic a transit through your final at 4nm and 1,200ft, or 6nm and 1,800ft, if there were a steady stream of IFR arrivals and just rely on traffic info? What happens when one of the IFR arrivals justifiably asks for traffic avoidance and screws your sequence?