The Girls Aloud star has gone for a different look

Newly-single Sarah Harding sported a new look as she strutted down the catwalk at London Fashion Week on Saturday.

Sarah, 29, who’s called off her engagement to DJ Tom Crane, 31, has dyed her short hair red and styled it into sleek waves.

The Girls Aloud star seemed calm and composed at the LOOK magazine fashion show, but friends of her former fiancé have revealed that her mood swings were to blame for her split from Tom, 31.

‘She’d be laughing and joking one minute and crying the next,’ one of Tom‘s mates tells us.

Tom thinks she’s erratic.’

NEW PICTURES London Fashion Week 2011>>

SEE PICTURES Sarah Harding goes brunette for London Fashion Week >> 

PARTY PICTURES See the snaps from Sarah Harding‘s engagement bash>>

SEE PICTURES Sarah Harding minus her engagement ring>>

SEE PICTURE Sarah Harding reveals her engagement ring>>

Esme Riley