Mutya Keisha Siobhan are no more?

Music Blimey, this is quite a paragraph on the Official Charts website about guests on upcoming episodes of The Graham Norton Show:
"There's a big reunion set for October 18, as the original line-up of Sugababes will perform on TV for the first time in five years - and they've gotten their original name back. Kind of. Billed as The Sugababes, Mutya Buena, Keisha Buchanan and Siobhan Donaghy (formerly known as MKS) will collaborate with DJ Spoony for a performance of Sweet Like Chocolate. The song features on DJ Spoony's upcoming album Garage Classical, a collection of reworked garage staples from the 1990s featuring the likes of Paloma Faith and Lily Allen."
So there's a legal loophole in the definitive article? Or have they actually got the rights to their name back as CelebsNow suggest?  Either way, or whatever, this is quite a paragraph. 

Now, here's an earlier appearance by some version of Sugababes on some version of Norton's show. In 2002.