Spot the ball

One of these is not a football!

Hiding in the back of the garden near the composite heap is a Calvatia gigantea  - a giant puffball. We had two last year growing in roughly the same area so the spores must have found another place to grow. The funny thing is that I was in this area of the garden two weeks ago and I never noticed it?

I like mushrooms but have no interest in finding out if this monster is edible.