Is UKIA still trading? If so, are they trading insolvently? If they are, check out the law, people. UKIA is a Limited company, bound by Company Law.
If the company is in administration then, if you are owed money, you'll need to lodge a claim with the administrators. You will be an unsecured creditor, behind the banks and anyone alse with a charge registered against any UKIA property.
If the boss has made personal guarantees you may be better able to claim.
I wouldn't waste any money persuing a claim though.