“Stay of legal proceedings 9.—(1) A party to an arbitration agreement against whom legal proceedings are brought (whether by way of claim or counterclaim) in respect of a matter which under the agreement is to be referred to arbitration may (upon notice to the other parties to the proceedings) apply to the court in which the proceedings have been brought to stay the proceedings so far as they concern that matter. … (3) An application may not be made by a person before taking the appropriate procedural step (if any) to acknowledge the legal proceedings against him or after he has taken any step in those proceedings to answer the substantive claim. (4) On an application under this section the court shall grant a stay unless satisfied that the arbitration agreement is null and void, inoperative, or incapable of being performed. … “Competence of tribunal to rule on its own jurisdiction 30.—(1) Unless otherwise agreed by the parties, the arbitral tribunal may rule on its own substantive jurisdiction, that is, as to— (a) whether there is a valid arbitration agreement, (b) whether the tribunal is properly constituted, and (c) what matters have been submitted to arbitration in accordance with the arbitration agreement. (2) Any such ruling may be challenged by any available arbitral process of appeal or review or in accordance with the provisions of this Part.”
“The judge [below] dismissed the application, holding that no arbitration agreement had been concluded between the parties and that the agreement relied on by CNA was thus ‘null and void’ within the meaning, and for the purposes, of s.9(4) of the 1996 Act.”
“The burden of proving that any of the grounds in s.9(4) has been made out lies upon the claimant and, if the defendant can raise an arguable case in favour of validity, a stay should be granted: Hume v AA Mutual International Insurance Co Ltd [1996] LRLR 19.”