Northern Ireland unpaid wages: can I go to an Industrial Tribunal?

Potentially. nidirect says that if you have not received your full pay and the issue is not resolved informally, you may be able to take the matter to an Industrial Tribunal. Most tribunal claims have short time limits and the Labour Relations Agency offers free, impartial advice. Keep your payslips, contract, hours worked, bank records and written communications. Official source: nidirect. Guide: https://getinstantlaw.com/uk/northern-ireland/unpaid-wages