As you might imagine, I took this in a hurry. Just happened to have the pocket camera with me in the garden, opened the pool filtration area, went to put my hand in but quickly stopped!
I did NOT call it Jessie, even if it was fat! That adder was a big un boy! Is yours 2 ft long? Like all females, it was dangerous too. Oh, and it had the ACO logo by its ankles Dave.