Mr. Declan Fitzpatrick:

There are a multitude of permutations that could possibly be implemented. Depending on which option is chosen, there will be varying limitations on the operation of the two runways simultaneously. There can be completely independent operations, whereby what is going on one runway has absolutely no impact on what is happening on the other, or there can be dependent operations, such as at London's Heathrow Airport, where what is happening on one runway is dependent on what is happening on the other. It is all about designing a concept of operations and working out how the two runways will operate at the same time.