Toys N Bricks is reporting that LEGO Series 3 Collectible Minifigures can now be found at WH Smith and The Entertainer Toy Store in the UK.
You can find a dot code 'cheat sheet' here, but don't forget to validate the contents by feeling for important elements. Reports suggest that the dot codes are not always reliable.
You can see the full story at Toys N Bricks.