Arbitration – Award. Following a dispute between the parties, the claimant company, Diag, succeeded against the defendant Czech Republic in an arbitration. It sought to enforce the arbitration award in a number of countries, including Austria. The Supreme Court of Austria held that the award had not yet become binding on the parties. Diag, sought to enforce the award in the English court. The court held that the Supreme Court of Austria's decision gave rise to an issue estoppel that would prevent Diag from enforcing the judgment in the English court.