- Is that cyclocybe aegerita? - I have no idea. found in UK at time post was made if that helps ID - Not really. Can’t be sure from pictures alone, but it does really look like them. I don’t know many lookalikes, but I guess there could be. If that is the case, that is one very tasty mushroom to pick. - With the white spores this is likely an Armillaria sp. - From the picture it looks like brown spores to me. I had never seen Armillaria sp, but from pictures I must say it does look very similar. - I’m not sure about the spores color, could be white or could be brown. That color resembles very much the color of cyclocybe just picked. It goes more brown a while after picking. - There’s white powder all over the tops of the caps at the bottom of the photo which is most likely spores. - Oh, that is true. I was looking at the one turned over which appears to me to have brown spores. It’s difficult to tell these things from a single picture. 
 
 
 
 
 
 
- Woah, look at that spore load. Nice find. 



