Garden Fungi - what type?

My neighbour Sarah was telling my other half about all this fungi she had in her garden. Nick said something about me taking it's picture, so Sarah very kindly didn't destroy it and let me go round and take some pictures. There was quite a lot and they were very big. I did check my book which only has a few different types in it, and I couldn't identify it. Does anyone know what it is? Is it poisonous?

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