This is why you should freeze perishable food on the day of purchase (or ASAP afterwards).
Best Before are not related to food safety - they relate to food quality.
Cucumber for example eaten after the best before is unlikely to kill you - however it wil be pretty yucky. Whereas Sausages eaten after the USE BY date may have developed enough bacteria to make you seriously ill - EVEN if they are cooked properly!
The Express should be more careful in their surveys!!!