Originally Posted by
Nimmer
especially as Heathrow PLC want to be able to depart southerly departures off the northern runway, or northerly departures off the southern runway, thus crossing go around tracks and possibly other departures.
The missed approach case has always existed, of course, with departures from either runway going both north and south depending on the destination/SID, and the potential for conflict with a GA on the other runway being taken into account.
What would be new is sustained simultaneous departures from two runways where significantly more than 50% of them would be on the southern SIDS. That will be interesting.