law: Arbitration Act 1940
  Section 3
  Receipt of Written Communications
  (1) Unless otherwise agreed by the parties, -
  (a)  any 
  
  written communication is deemed to have been received if it is delivered to the
  
  addressee personally or at his place of business, habitual residence or mailing
  
  address, and
  (b) if none of the
  
  places referred to in clause (a) can be found after making a reasonable
  
  inquiry, a written communication is deemed to have been received if it is sent
  
  to the addressee's last known place of business, habitual residence or mailing
  
  address by registered letter or by any other means which provides a record of
  
  the attempt to deliver it.
  (2) The communication is deemed to have been
  
  received on the day it is so delivered.
  (3) This section does not apply to written
  
  communications in respect of proceedings of any judicial authority.