LGW SIDs, East, Northeast off 26L
Is there a fundamental difference in geographical routing between the original LAM/CLN departures of 26L and the RNAV1 SIDs? The reason I ask is that living in Redhill, we are subject to regular overflight, particularly evening departures from LGW. (In context, I am ex BA B737/DC-10 flying shorthaul and longhaul from LGW) Also AD 2-EGKK-3-1 shows the noise preferential routings but the notes for the RNAV1 plate says, "RNAV1 SIDs reflect NPRs". Have these flight paths changed when they previously avoided this area and if so why?
Many thanks for any answers.