From the same site:
"If your complaints to the head teacher, governors and LEA haven't worked then you can complain to Ed Balls, the Education Minister at the Department for Children, Schools and Families.
The DCSF used to be called the DfES and before that the DfEE.
The DCSF thinks that the LEA should treat all allegations of bullying seriously and should investigate them with the school concerned. However, it's up to the LEA to decide the extent of the investigation.
Where there are conflicting accounts of events the LEA should try to establish which account is the most accurate. It will be relevant to consider factors such as the seriousness of the alleged incidents and the number of pupils involved.
Although pupil behaviour issues are primarily the school's responsibility, the DCSF believes the LEA should consider using its powers to intervene where necessary, for example where the education of pupils at a school is being severely prejudiced by the school's failure to take adequate steps to deal with bullying.
Even if the LEA does not directly intervene, it can provide help from the Education Welfare Service or advise on a possible change of school if requested by the parents. In cases where intervention is considered unnecessary, but the problem subsequently escalates, the LEA might need to review their earlier decision. However, the DCSF says that any decision whether to exclude an alleged bully is exclusively a matter for the head teacher."
You must be so worried about him, and all this must be affecting his ability to concentrate too, poor lad.