The biggest difference I found in NY area was that inbounds were down at 6000 feet or so still with 80 to 100 miles to run. That's obviously a bit different to the LTMA, not that it couldn't work though. Although the Dutch might have to do most of the sequencing for us, and it probably wouldn't help our giant CO2 footprint reduction masterplan. It's not just how stupidly close you can build your airports, it's what's around them too.