Boland v Yates Property Corporation Pty Ltd ; Rondel v Worsley ; Gianarelli v Wraith ; Keefe v Marks ; Arthur JS Hall and Co v Simons ; Saif Ali v Sydney Mitchell & Co ; Rees v Sinclair ; Hunter v Chief Constable of the West Midlands Police ; Demarco v Ungaro ; Hollington v F. Hewthorn & Co Ltd ;