After earlier reports suggested that the project would be called London Ishq or Yeh Kahan Aa Gaye Hum, Mumbai tabloid Mid Day has announced a further possible name.
"Shah Rukh's YRF film tentatively titled Production No 45," reports the media outlet.
"Shah Rukh Khan who is currently shooting for Yash Chopra's untitled film in Ladakh refers to the film as Production No 45 as that's what the clapper board states."
However, sources close to the production house have denied that Production No 45 is the name of the film.
"It is true that Production No 45 is being used on the slate board, but this is nothing more than a working title. The number simply refers to the fact that this is Yash-ji's 45th film," said an insider.
"When shooting in the UK, a title of some description has to be registered before any filming can begin. Despite what has been reported, the film is not going to be called Production 45.
"The official title will be officially announced by mid-September."
The movie, which also stars Anushka Sharma, is scheduled to release on November 13.
Watch a teaser trailer below: