How much do you like the big shops knowing about your spending habits?

Loyalty cards at supermarkets are one thing.

But what about shopping centre points cards, which spy on your purchases across a wide range of outlets?

Some people might have no objection to high street retailers and companies keeping details of their spending and consumer habits.

In fact, they often actually prefer retailers who offer reward schemes.

But while some think that swiping the card is to credit them with loyalty points others realise it is to collect information about their consumer habits.

What do shoppers in your town make of store cards, city cards and other loyalty schemes?