The consultation says you are revising all the take-off and landing routes. Does that mean some areas become free of planes while others are under a flight path for the first time?
No. This is currently a very busy portion of airspace and, as can be seen from the maps of current over flight around Gatwick (and London City), the consultation areas all fall within areas currently over flown. However, flight paths would change and so some people will see more overflying aircraft as a result of changes, while some will see fewer and many will see no change.
Overall, the benefits of concentrating traffic, more continuous climb and descent meaning aircraft are at low altitudes for less time and positioning routes over the sea (London City only) mean that fewer people will be affected by overflights.