law: Arbitration Act 1940
  Section 4
  Waiver of Right to Object
  A party who knows that -
  (a)  any  provision of
  
  this Part from which the parties may derogate, or
  (b)  any  requirement
  
  under the arbitration agreement,
  has  not been complied
  
  with and yet proceeds with the arbitration without stating his objection to
  
  such non-compliance without undue delay or, if a time limit is provided for
  
  stating that objection, within that period of time, shall be deemed to have
  
  waived his right to so object.