In a hugely significant development Heathrow Airport (BAA as was) has said it will not be pressing for mixed-mode (planes landing on both runways throughout the day).
A Heathrow source told The Times (4/2/13):” It would be a lot of pain for not much gain,” said a Heathrow source. Heathrow confirmed its position when appearing before the Transport Committee of the London Assembly (13/2/13) It is highly unlikely that any Government would recommend mixed-mode without the support of Heathrow Airport.
For an easy-to-read explanation of mixed mode in PDF format, click here.