On Mon, 16 Jan 2012 11:08:43 +0000, Granity wrote:

For a 1% discount Tesco's get: Your name and address, a record of what
you purchase and how frequently you shop with them, this means they can
target you with relevant adverts for products,

Don't appear to at least not that overtly. It took a several years
for them to drop meat products from our Clubcard offers. We have
never bought meat from them, don't eat the stuff...

THERE IS NO SUCH THING AS A FREE LUNCH.

Yes they have lots of information about our buying habits but our
shopping basket is pretty consistent and boring. I'm anything but a
sheep as well. If a voucher is useful I'll use it, if I remember!

--
Cheers
Dave.