The 'Sound of the Underground' hitmakers had previously hinted at plans to mark their 10th anniversary this year and on May 12 their regular songwriting team Xenomania said it is back in the the studio with four of the five bandmembers.
"Prepping to go in the studio with Nadine Coyle Now for new GA sessions... New GA sessions with Nicola Roberts Kimberley J Walsh Sarah Nic Harding in the studio over the last week," Xenomania posted on Twitter.
There was no mention of fifth bandmate Cheryl Cole's involvement.
Xenomania, founded by Brian Higgins, wrote several of the band's biggest hits including 'The Promise' and 'Something Kinda Ooooh'.