Sian O'Callaghan: Mother pays tribute to daughter

A taxi driver has pleaded guilty to murdering a woman who had been returning home from a nightclub in Swindon.

Christopher Halliwell sexually assaulted 22-year-old Sian O'Callaghan before stabbing her in the head and neck, in March last year.

He was been sentenced at Bristol Crown Court to life in prison, with a minimum term of 25 years.

Sian's mother Elaine O'Callaghan said she wanted her to be remembered as ''the incredible person that she was''.