It is Sam.The numbers are published on the back page and are checked against numbers inside the paper to win prizes.They are also recorded on line to collect Nectar points.
A unique set of six numbers every day in MoS and Daily Mail. You enter them in your DM account online and save them up, then you can use them to buy things such as £5 voucher in certain shops. They are now Nectar points, so can be used in Sainsburys.