Ocado 2 Aberdeen Angus Beef Stirloin Steaks. Our Aberdeen Angus Beef Sirloin steak is carefully selected and matured slowly over 28 days. The Sirloin steak is tender, lean and full of flavour. This popular steak cut will deliver a juicy & flavoursome steak. Our Aberdeen Angus Beef has many superiour & unique attributes. Angus Beef has natural marbling within the meat which enhances the flavour and texture of the meat and gives a superior quality eating experience every time. Ocado works closely with our producers & processors to ensure the highest of quality. All Ocado Beef is sourced from Farm Assured farms in the UK & Ireland, reared to high standards of animal welfare, husbandry and with good environmental practices. Ocado beef only comes from prime Beef animals.