The fate of the Thames Cable Car from North Greenwich to the Royal Docks has been left hanging in the air after a new safety review was ordered.
Friends of the Earth campaigners have forced the move by claiming that the cable car would cross the Public Safety Zone for City Airport flights.
The TFL scheme had already received the backing of Greenwich and Newham councils, but in response to safety concerns, London Mayor Boris Johnson has ordered a national air traffic services safety assessment, due to complete by March.
More information can be found in Adam Bienkov's report for Snipe, and Darryl at 853 has more on the campaigners who have highlighted the issue.