An A-level student who launched a ferocious knife attack on his 14-year-old ex-girlfriend near her school gates in Stourbridge has been sentenced to 13 years in youth custody.

Wolverhampton Crown Court heard that Samuel Gayzer-Tomlinson disguised himself by dyeing his hair before stabbing Chloe West at least 20 times outside Ridgewood High School in April.

Judge John Warner told the 18-year-old, who admitted attempted murder, that the "horrific" incident was aggravated by Chloe's young age and the fact that it happened in front of other pupils.

Gayzer-Tomlinson, of Turls Hill Road, Sedgley, also pleaded guilty to wounding 16-year-old Ben Hudson, who intervened during the attack.

Judge Warner was told that Gayzer-Tomlinson, who hoped to study veterinary surgery at university, inflicted wounds to Chloe's head, neck, face, back and shoulders with a 7.8in (20cm) kitchen knife.

The teenager, who was said to be "obsessed" with Chloe after she lost interest in their relationship and ignored his calls, drove to the scene in a Volkswagen Golf.

The court heard that Chloe had ended the relationship in the middle of March and told Gayzer-Tomlinson she did not want to speak to him.

Opening the facts of the case, prosecutor Hugh O'Brien-Quinn said: "The defendant was unable to take this rejection and, it seems, began to plan his revenge."

After setting up two false Facebook accounts to contact Chloe, Gayzer-Tomlinson dyed his hair a "blacky blue" colour and drove to Park Road West to confront her.

The student, who met Chloe through their shared interest in horse riding, began to attack her at about 8.45am as she walked to school with friends.

Witnesses to the subsequent knife attack, including a parent dropping off a child, described how Gayzer-Tomlinson punched, kicked and repeatedly stabbed Chloe.