A plan for a fourth runway at Heathrow has been sent to a government group looking at airport expansion in the south.
The proposal has sparked anger in the Thames Valley as it's suggested extending the site closer to Windsor. It could also lead to increased flight numbers by up to half a million a year.
Our Transport Correspondent Mike Pearse has been looking at the arguments for and against the extra runway.
He spoke first to Jock Lowe, a former Concorde pilot.
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Mostly dry with sunny spells throughout the day. Some isolated thundery showers are possible in Kent this morning and feeling fresher
Sunny this evening, then dry overnight. There is the risk of thundery showers for Kent tomorrow morning, then sunny spells by the afternoon
Sunshine to end the day then dry tonight. Tomorrow will be mostly dry and feeling fresher with the risk of a heavy shower in the afternoon