Take That may be reunited and performing in their original line up, but front man and songwriter Gary Barlow has hinted that it may not be a permanent arrangement. 

During his show on Radio 2 yesterday morning Barlow, who is celebrating his 40th birthday today (January 20), said:

"When we came back in 2005 we had the conversation, "Can we do this as four?" Thanks to the fans who bought the records, we proved we can."

"I think even moving forward, I know we’re back with Rob right now, but we still see our future as a four-piece band."

"We see Take That as a four-piece band in general."

Rumours about Robbie Williams' place in the group have escalated recently after the former solo star pulled out of a New Year's Eve gig with Take That in Barbados due to 'family commitments'. 

Watch the five-piece perform 'The Flood' here: