Heathrow has not yet started any discussions with the government in relation to environmental issues raised by the Davies Commission, the airport's CEO has said.
Despite transport secretary Patrick McLoughlin stating today that he "very much hopes" a decision on expansion will be made by late July, John Holland-Kaye (pictured) said "conversations have yet to take place" on issues such as noise, emissions and night flights.
In December, the government further delayed a decision on whether to build a third runway at Heathrow, causing anger among businesses and politicians.
Speaking in central London, where he gave his first speech since the Davies Commission recommended Heathrow over Gatwick for expansion, Holland-Kaye said there was "no environmental" reasons for the delay.
He also didn't rule out a ban on night flights despite it being one of the proposals in the Commission's report.
"We want to discuss this with the government but haven't started those conversations yet," said Holland-Kaye. "What I will say is there are no show stoppers in the conditions set by the government, specifically on night flights.
"There is an opportunity here to reduce night flights which will be a big benefit to local communities and we will work with the government and airlines before making any further announcement on that."
Holland-Kaye backed the government over the delay saying it had been "stung by these kind of announcements in the past" and will want to make a "fully robust review" before making a decision.
'New plan'
In his speech Holland-Kaye outlined his vision for a "new plan" designed to meet all environmental targets, which has support from the "majority of local communities".
"The only plan that creates hundreds of thousands of skilled jobs, that has the support of every major employer's group, as well as unions.
"The only location which all the airlines agree is the right one and the only plan with a strong policy basis, following the unanimous and unequivocal support of the Commission," he said.
Click here to see the plans for an expanded Heathrow