Thats a $10.00 value here in the US! My favorite is Ethiopia Sidamo. They never give away a whole bag of beans. But if you buy a bag of beans, they will give you a free tall drip. I grind my coffee fresh too!
There was a voucher available yesterday that entitled you to get a free bag of Starbucks coffee beans, upon purchase of a handcrafted drink, from what appears to be any Starbucks in the UK too.