ScuL:
Oh to stay on the burger subject, here is the menu of Kiwi chain "Gourmet Burger Kitchen" UK
http://www.gbk.co.uk/menu/burgers/
I ate at one years ago in West Hampstead, the story I remember was that they were former Wisconsin (the NZ burger chain, not the State) employees who moved to the UK and saw a gap in the market.
It was well up on the this of burger experiences.