so these seem to be the current grocery offers on tesco.com:

http://www.tesco.com/superstore/prod...rodId=58082654
http://www.tesco.com/superstore/prod...rodId=54654480
http://www.tesco.com/superstore/prod...rodId=57014853
http://www.tesco.com/superstore/prod...rodId=52172540
http://www.tesco.com/superstore/prod...rodId=55885187

however, as you can see, they don't give details of what the points offer actually is - even at checkout

what we need is a tesco insider........