Want your Mushroom ID? Ask here and also look at some of the old posts here to see what you might have. Make sure you use a field guide and triple check using google images.
Easy! Birch Polypore*. It's not supposed to be edible (but only on account of the dense rubberyness of the flesh, not because of toxicity), it's pretty common on Birch and spells death for the tree when it arrives so is often found densely infesting dead stumps and fallen logs. The soft white underside on young specimens can be sliced carefully off and used as a surprisingly effective emergency wound dressing. Dried, it also burns reasonably well as a tinder but can smell awful so not for use indoors!
OK, here's one more. These were everywhere. I apologise in advance if they're common and/or uninteresting, but I have no means of identifying them as our copy of Rogers is still in the post!
Even after all these years I'm still learning fungi (as a forager you never really stop learning!) but based on your description and its prolific habits I'm going to hazard that it's a Yellow Swamp Russula (Russula claroflava - also known as a brittlegill)*
Although it's supposed to be edible, I tend to avoid all Russulas because there are so many of them and it could be possible to mis-identify one and mistake a toxic specimen for an edible one. Russulas are a bit of a minefield!
You'll love your Roger's when it arrives - it's a fab book. I also like the Encyclopedia of Fungi of Britain and Europe by Michael Jordan and I think that the two books compliment each other very well.
Very much looking forward to the arrival of Rogers. There's so much woodland round here that have to contain boletus and cantharellus in there somewhere!