Ok Micky. This is now open to discussion. The most common is the field mushroom which does not have a blue leg. Then there are the field.blewits and the wood blewits. This is only what I've learned by collecting whilst shooting and not by any great knowledge. As I understand it, the blewits grow in clumps whereas the the common field mushroom growin irregular rings which are by far the most common to see. Now the question is, did that ring have white or blue legs ? Also, it's slightly late in the year for the common mushroom, normally seen in September October. Jok.