Sarah HallTwo thugs robbed a man of a �700 gold necklace after hitting him over the head with a bottle before breaking the jaw of another man who tried to help, a court heard.Sarah Hall

Two thugs robbed a man of a �700 gold necklace after hitting him over the head with a bottle before breaking the jaw of another man who tried to help, a court heard.

Ashley Youngman, 18 and Nathan Archer, 19 attacked the first victim as he walked home from the pub along Middleton Road in Gorleston, Norwich Crown Court heard.

Lindsay Cox, prosecuting, said the victim remembered being hit with a bottle over his left eye, while 'his next memory is waking up down on the ground with is gold chain now missing and he was covered in blood.'

Mr Cox said Youngman and Archer had then attacked David Reid, part of a group who saw what happened and who told them to 'leave it out'.

They knocked him to the ground and kicked him to the head as he lay on the floor.

When police arrived on the scene Youngman and Archer fled, but both were arrested shortly afterwards. Mr Cox said Mr Reid had his jaw broken in two places and had to have hospital treatment for his injury. In an impact statement he said the robbery had a 'massive effect on his life'.

Archer of Colomb Road, Gorleston and Youngman of Cambridge Avenue, Gorleston both admitted robbery and causing grievous bodily harm to Mr Reid on September 12 last year.

They were both given four years in a young offenders institution and judge Paul Downes told them 'this was really thuggish behaviour of the worst possible kind.'

Michael Clare, for Archer, said he was not involved in any planning before the robbery and had not been the one to hit the victim with the bottle.

Katherine Moore, for Youngman, said he deserved credit for his guilty plea and that he was still only young. She said he used his time while on remand to improve his English and maths skills.