It was suggested today that a station built just for Crossrail may never actually see any passengers.
A property development company has spent £80 million building a station at Woolwich.
But it claims it could now be left empty over a dispute about who pays for the rest of it.
If the money isn't found, south London would be denied a vital rail link.
Our Political Correspondent Simon Harris has the details:
More top news
The Mayor of London is one of several familiar faces popping up when the show returns to screens for its fifth series in November.
Here is a timeline of some of the key events in the debate over expansion of airport capacity.
More than 700 households were today bracing themselves for a government decision which could see their homes bulldozed.