In DLS v DLT [2025] SGHC 139, the dispute began when a contractor first sought to set aside two decisions in a partial arbitration award. As part of this initial challenge, the contractor argued that one of the arbitrators had shown apparent bias by not disclosing a previous appointment in an unrelated arbitration involving the sub-contractor's chairman. The High Court reviewed the circumstances and rejected the argument that apparent bias can be included as a new basis for setting aside the arbitral awards, calling it "hopeless." It further held that even if it had allowed the contractor to raise apparent bias as a new basis, it would have failed on its merits.