The challenge of expanding the UK's aviation capacity sure is keeping the country's architects busy. Since Foster -t Partners unveiled its highly ambitious Thames Hub proposal - a scheme also worked on by engineer Halcrow - a host of rival firms have revealed plans of their own. Gensler has put forward the idea of a floating four-runway airport which - like Fosters' scheme - would be located in the Thames Estuary, while Make Architects is working up a scheme to expand Stansted.
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