Same design as the 1 oz Proof version. I looked high and dry before going to the UK recently for the 2013 proof, couldn't find one.
And now I know why...not even released yet. I like the symbolism of the design but I'm not convinced the design is very good. Too simplistic. And the exposed breast is nothing different from a painting out of the classics but this one...just looks a little crass.
Now the same image of Britannia as on the statue in front of Buckingham Palace: That would be a great coin.