The scheme was overtaken by the economic crisis, and the stranglehold of BAA and BA, both of which have a lot invested in Heathrow, has prevented its revival.

该计划被经济危机所取代，英国机场管理局和英国航空公司对希思罗机场进行了大量投资，这两家公司的严格控制阻碍了希思罗机场的复兴。