You can usually represent yourself in an Employment Tribunal, and many people do, but you must follow the tribunal rules and present evidence clearly. You will normally need to contact Acas for Early Conciliation before submitting a claim, and strict time limits usually apply, often three months less one day from the dismissal. Whether you qualify depends on factors such as your employment history, the reason for dismissal and the date it happened, so check the latest guidance on GOV.UK and Acas. For a complex case, consider advice from a solicitor regulated by the SRA.