 On 28 November 2006 , both men were sentenced to life imprisonment . The minimum termed for Carty was fixed at 21 years , and that for 18 @-@ year @-@ old Brown at 17 years . The trial judge said he could not tell who wielded the knife but considered both defendants equally guilty . Both sentences were referred to the Court of Appeal ( Criminal Division ) as " <unk> lenient " by Her Majesty 's Attorney General , Lord Goldsmith QC . That court , constituted by the Lord Chief Justice of England and Wales , Lord Phillips of Worth <unk> , Mr Justice <unk> and Mr Justice <unk> , increased Brown 's minimum term to 20 years , although it did not interfere with the sentence imposed upon Carty . 
