Originally Posted by
LookingForAJob
I've never worked Heathrow but at my last operational unit when it was busy it was quite common for the approach controller to turn one off the SID on first contact which enabled the next to be launched maybe a minute later.
At Heathrow it's rare to see a departure turned off the SID below 4000 ft (other than CPTs on 09s) as it's then classed as "off-track" and reported as such in the stats.