Boris Johnson has announced plans to close all London Underground ticket offices.
Which is a bit awkward, since Boris pledged to oppose any closures in his 2008 manifesto.
Only last year Johnson was boasting that he had kept his promise to stop ticket office closures.
Now he's closing them all and the unions are preparing for battle.
Politicians should be careful what they promise. It took Boris five years to come around to Ken's view that ticket offices just aren't that necessary when people are using new forms of payment.