Rail union RMT announced on Wednesday (February 3) that they will start balloting staff on Underground lines for the Night Tube service.
The union has recommended that staff accept the pay and conditions deal for the 24-hour service.
Transport for London's latest offer to workers on the Night Tube includes a four-year pay rise and a £500 bonus to drivers and other staff.
The Night Tube service will operate on five lines in the capital – Piccadilly, Northern, Jubilee, Central and Victoria – on Fridays and Saturdays.
In a statement on Wednesday, RMT said they will be conducting a referendum ballot of their roughly 10,000 strong members on February 11, with the union executive recommending workers to accept.
In response to the recommendation, a TfL spokesman said: "Our very fair offer reiterates our previous guarantees on protecting the work-life balance of our staff and a four-year pay deal which remains within our business plan.
"We continue to progress plans for the implementation of the Night Tube, including the recruitment of hundreds of new staff to operate Night Tube."
A 24-hour Tube strike set to take place last month, was cancelled at the eleventh hour , to allow for further conciliation talks.
Other unions still undecided
While RMT look set to accept the pay and conditions offer, three other unions representing Tube staff are as yet undecided.
In an interview with an ASLEF union representative Last month, getwestlondon heard that the union was initially happy with the revised deal , stating “the Night Tube will happen.”
The Night Tube service was initially due to launch in September last year, but hit complications early on with unions representing workers on the underground reaching a stalemate with London Underground bosses over pay and working conditions.
The latest news however, means that the 24-hour service could be put back on track, with RMT's recommendation coming as a giant leap for the Night Tube.
Meanwhile, RMT union is still in talks with London Underground bosses over a planned 48-hour Tube strike this weekend.
The strike, set to take place from 9pm on Saturday (February 6) ending at 9pm on Monday, is over a dispute with London Underground bosses with regards to job losses and ticket office closures.