In the past, similar requests have foundered on demands by competition authorities that the petitioning airlines surrender valuable take-off and landing slots, particularly at London's Heathrow.

以前类似的请求都因为竞争监管部门的要求而没有成功，因为提出申请的航空公司必须放弃弥足珍贵的起降时间，特别是在伦敦西斯罗机场。

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Airlines planning to operate the A380 at Heathrow include Singapore Airlines, Emirates, Virgin Atlantic, Qantas, Qatar Airways and Malaysia Airlines.

BBC: Heathrow prepares for superjumbo

America is right to demand more open access to Heathrow, the world's biggest and most lucrative international hub, which is now restricted across the Atlantic to a small club of airlines known as the Heathrow Four: United Airlines, American Airlines, British Airways and Virgin Atlantic.

ECONOMIST: Free the Heathrow Four

At present, only four airlines can offer flights between Heathrow and the US and more airlines from the two countries want access to the lucrative market.

BBC: 'Open skies' talks resume