Sande praises new tunes from original Sugababes trio

The original members of the Sugababes' new music is sounding "great".

Mutya Buena, Siobhan Donaghy and Keisha Buchanan are in the studio together for the first time since 2001 and Emeli Sande - who is writing tracks for them - is sure they will do well when they eventually release a single.