“9.4.1 As noted above, the TCC will also hear any applications for declaratory relief arising out of the commencement of a disputed adjudication. Commonly, these will concern: (a) Disputes over the jurisdiction of an adjudicator. It can sometimes be appropriate to seek a declaration as to jurisdiction at the outset of an adjudication, rather than both parties incurring considerable costs in the adjudication itself, only for the jurisdiction point to emerge again at the enforcement hearing … (c) Disputes over the permissible scope of the adjudication, and, in particular, whether the matters which the claimant seeks to raise in the adjudication are the subject of a pre-existing dispute between the parties.”