Mountain bluet, cornflower

..apparently.  This flower appeared in a corner about 2 years ago - a free gift from nature, or birds.  It's beautiful , but it is spreading prolifically.  I learned the name of it via the lens function on my phone although I think it has various names.  

The yellow Welsh Poppies in the extra are also a gift from nature.  They are spreading to every free spot in the garden.  Last year I dug out as many as I could, but they have just returned and as they are a bright splash of colour I'm just leaving them.