Originally Posted by
HEATHROW DIRECTOR
Maybe they don't have parallel deps now but I've done a good number during my time there!
AFAIK, the last significant use of parallel departures at LHR was during Phase I of the Operational Freedoms trials in late 2011/early 2012.
Even then, there were only a few dozen over a 5-month period (though the official stats reported more than actually occurred) and the measure wasn't included in the later Phase II trials.
"Tactically Enhanced Departures" (aka "TED"), as they are officially referred to, would of course be an everyday occurrence if and when R3 is built.