I, too am having difficulty seeing a spider.
The buttefly is a holly blue, Celastrina argiolus
I too was a little confused but I looked into fowberry's past posts and found this.http://www.nhm.ac.uk/natureplus/thread/11491
I can only presume there has been some sort of glitch.
Fowberry, If you read this, mark the question as answered. MWJB answered it correctly for you. The spider is a Wasp spider or Bruenicchi's argiope.