The company cannot avoid you debt. Employee wages etc are legally up near the top of the queue when a company is being liquidated.... before most other types of creditors. I think you have a very good chance of getting paid, employees usually do unless a company tanks big-time. Even then, there is some form of state insurance scheme.
Ask the company who the provisional liquidator is, and give him/her a ring. They will want details of how much you think you are owed for your claim. Tell the liquidator you also need a P45 asap.