A teenage killer's sentence has been amended following an error.

Andrea Cristea had been sentenced to three years and 10 months' custody for the manslaughter of Richard Day outside an Ipswich kebab shop last February.

But the 17-year-old, of Freehold Road, Ipswich, was called back before Ipswich Crown Court on Friday for a judge to revisit the sentence under the 'slip rule', which permits the court to correct accidental errors or omission.

Judge Martyn Levett told the court he had made an arithmetical error when reducing Christea's 64-month sentence by 25% for his guilty plea.

He said the reduction should have been by 16 months, not 18 months as he had wrongly calculated, and that Christea's sentence should have been one of four years' custody.

Judge Levett apologised for any inconvenience cause and added: "I correct my sentence not because of any change of mind, but solely because arithmetically I wrongly calculated the mathematical reduction of 25% of 64."