Well that makes 10 inbound to LHR from the US. Can't wait to see if more are on their way. I wonder what consideration exist if they do arrive about passing through FL200 into LHR? And if you can have 10 descents through FL200 why not have climbs out to FL200+++? Don't want to end up focussing on this all day, but at least it's tangible data in real time (at least if the feed is accurate). Anyone know crew on these inbounds?