Creu Prydain Decach
First, make a careful, detailed record of the incident you think was racially discriminatory. Note the names of possible witnesses and, if you can, also ask them to make a record of what happened.
At this stage it might be possible to sort out the problem informally by speaking to someone in charge, such a manager or teacher.
Since the Employment Act 2002 (Dispute Resolution) Regulations 2004 (the Dispute Resolution Regulations) came into force on 1 October 2004, if a dispute related to employment cannot be resolved informally and a formal grievance is made, it is compulsory for all employers to have minimum formal procedures for resolving grievances and a person must use those procedures before commencing a claim in an employment tribunal.