No. Most people go to the tribunal alone or with a friend. Follow the advice in Advicenow's free guides and videos and you will do just fine. Consider writing a submission for the tribunal using our free WCA tribunal submission tool which helps you set out your case just like an adviser would.
If you can find an adviser to represent you for free, of course take the help. We have heard of unscrupulous individuals on social media platforms like TikTok trying to charge people amounts like £3000 to represent them - you do not need it.