London Underground and TfL have long said they will begin night-time services on several lines on 12 September.
However, a story on the BBC website yesterday began: "The launch date for the London Underground Night Tube may be delayed, the BBC understands." The BBC did not name or suggest the identity of the source of the claims.
In response to the story, a spokeswoman for TfL provided PRWeek with a statement that she said was first issued earlier this week from LU chief operating officer Steve Griffiths.
Griffiths said: "We are working towards the 12 September for the delivery of Night Tube and are operationally ready, but, as we have always said, this cannot be at any cost."
Unions have so far staged two strikes this summer and recently scheduled a third over changes to working conditions including issues arising from the Night Tube plans.
Griffiths said: "We have made an extremely fair offer and, as we have shown already, we are prepared to be flexible to reshape it to best suit our staff. We are back at ACAS today to meet with the union leaderships and are committed to positive engagement to reach a deal."
Commenting on the BBC story, a spokesman for the union RMT said: "There seems to be a huge amount of confusion around this, they do seem to be sowing seeds of confusion."
However, he also said it would "actually be very helpful from everybody’s point of view if they could just halve the process and give everyone some breathing space".