If the changes go ahead it could mean:
- Less noise for residents as aircraft climb higher and more quickly on take-off
- Planes would also stay higher for longer when landing
- Changes could reduce the need for so much stacking - where planes circle while waiting for a landing slot
- They could also put more routes over the sea where possible
- It could also mean fewer aircraft CO2 emissions and fuel savings for airlines
More top news
An ITV News journalist worked as a Deliveroo rider to see what it's like - from induction to cycling through traffic and making deliveries.
Sutton United substitute goalkeeper Wayne Shaw has offered his resignation after eating a pie during a match.
Brixton's tribute to David Bowie will be a gravity-defying structure standing three storeys tall.