To collect miles through Tesco you simply shop at Tesco and present your Club Card at check out when you pay. For every £1 you spend you get 1 clubcard point.( Which equates to 0.01p in club card vouchers)

Every 3 months you are sent clubcard vouchers. You can spend these in store or on a number of offers including Airmiles or BA Executive Club miles.

For evey £2.50 in vouchers you get 400
BA miles ( or if you prefer 40 airmiles).

However if you spend an average of £60 a week this is doubled to 800 BA miles or 80 Airmiles).