Gary Barlow has offered to write for Robbie Williams if he goes through a "sticky patch" on his solo album.
'Patience' hitmaker Gary - who was estranged from his Take That bandmate until they reconciled in 2010 - is constantly writing new songs, and though he knows the 'Rudebox' singer is capable of penning his own material, is happy to help if needed.
He said: "I've written some stuff already, actually, with Rob.
"I mean, Rob writes all year round. But I always said to him, 'If you get a sticky patch or whatever, I'll come in and reignite all that stuff'.
"I'm someone who's always creating, writing - I've always got ideas. So he can use me whenever he wants."
Robbie returned to Take That for an album and tour last year and although he is now going back to his solo career, Gary believes they will be friends forever after patching up their differences.
He added to the Daily Telegraph newspaper: "I do feel like it wasn't just an 18-month thing with me and Rob. I think we'll be friends forever now."
At the end of last year's 'Progress Live' tour, Gary promised the rest of Take That - Mark Owen, Howard Donald and Jason Orange - a year off, but still stays in contact with his band mates socially.
He said: "I promised everybody a year off. Cause we've pretty much done album, tour, album, tour for five years. So I said to everyone as we left the tour, 'I'll call you in a year.'
"Of course, I've called 'em all. But we haven't talked about music!"