Co-op member shoppers only have eight days left to cash in their rewards balance or risk losing it for good. The supermarket chain - which has five millions members of its loyalty scheme - used to let you earn 2p in rewards for every £1 spent on Co-op branded goods or services. Shoppers could then use these rewards to spend on future purchases at the supermarket. However, this changed as part of a shake-up announced earlier this year. Now, you can no longer earn cash rewards, instead, you get