As well as her solo work, Polwart spent much of 2006 collaborating with other artists on a variety of projects; Roddy Woomble, the lead singer of Idlewild, asked her to help co-write and provide backing vocals for his solo album, "My Secret is My Silence", whilst Polwart provided several original songs for the BBC Radio 2 music/social documentary series "The Radio Ballads". Two of these songs, "Can't Weld A Body" and "Firethief", would later appear on her albums "Fairest Floo'er" and "This Earthly Spell" respectively. Polwart also supported The Beautiful South on their tour and she guested with David Knopfler at The Globe Theatre for a charity benefit for Reprieve.