RE: HETHROW RUNWAY THREE
A couple of quick notes.
LHR operates up until 23.59 (midnight) and officially from 6am. It is right that there are a few movements before 6, these are from Asia and so are often 747s. The reason for their exclusion is because of the times they need to fly from Asia and Australasia.
As for Gatwick. It has the most heavily utilised single runway in the world..as a result more flights into there (well before BA’s policy to reduce flights from LGW) was quite difficult.
Richard