Fresh from its recent failure to persuade the world that airlines fly up to twice as quiet and clean as they actually are, Heathrow's latest environmental initiative appears to involve claiming that aircraft aren't really there at all.
Here's a recent weekday morning snapshot with a typical 9 inbounds over Greater London (6am to 7am is the busiest part of the day for arrivals, when both runways are normally used to accommodate landing traffic).
First, FlightRadar24's view:
And Heathrow's version of events from its WebTrak system:
