KT Tunstall's name all about impact

EDINBURGH-based pop star KT Tunstall has revealed a new reason behind her stage name.

The singer, 32, had previously said she changed her childhood name Katie because it "reminded her of a buxom maid".

However, she now says it is all to do with geology. She said songwriter Billy Bragg found a term called the "KT Impact, which marks the start of the extinction of the dinosaurs".