Mysainsburys is an online portal designed for Sainsbury's employees to access to the resources such as HR related services, Payroll, Work Schedules and paystubs online.Sainsbury's,officially known as J Sainbury plc, is a Second largest supermarket chain in the United Kingdom. Established in 1869 by John James Sainsbury, the company started with a store located in Drury Lane, London. Address : 33 Holborn EC1N 2HT Drury Lane, London, UK