What if the Contractor has a dispute with a subcontract which is also disputed in connection with the main contract?

What is the procedure if the Contractor has a dispute in connection with a subcontract which is also a matter disputed in connection with the main contract?

If a matter disputed by the Contractor in connection with a subcontract is also a matter disputed in connection with the main contract, the Contractor may refer the Subcontract dispute to the Adjudicator at the same time as the main contract referral if the Subcontract allows. The Adjudicator then decides the disputes together and references to the Parties for the purposes of the dispute are interpreted as including the Subcontractor (see Clause W1.3(4).