BBC News
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image captionEllie, 17, was a pupil at Hardenhuish School, Chippenham
A mother who fought to change the law around murder says her daughter would be "very proud".
Announced on Tuesday, Ellie's Law, named after Wiltshire teenager Ellie Gould, means teenage killers could face sentences of up to 27 years.
Ellie was stabbed to death by her ex-boyfriend Thomas Griffiths in May 2019.
He was 17 at the time, so received a more lenient sentence than an adult defendant would have.
The change in the law, announced by Justice Secretary Robert Buckland, is the culmination of a two-year campaign by Ellie's parents.