I am a burgeraholic. I love burgers. I find burgers in this country are total crap, the absolute worst I have ever had, no matter where I get them. However, I found a restaurant by chance that has awesome burgers. They are real, good meat, not the boiled, peeled off the bone and put back together stuff you get everywhere else. I think it's a Kiwi chain but the one I went to is in Bellsize Park, right next to the tube station, on the right as you come out. It's called Gourmet Burger Kitchen and their website is www.gbkinfo.co.uk If you like good, proper burgers and live in London, this is the place to go! Just thought I'd share 
June
Howdy fellow burgeraholic!
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June, there are lots of places in London that do from good to out of this world burgers!
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Here are some of my faves, as well as a few places I've heard good things about:
All Star Lanes - In Bloomsbury. Burgers and Boutique Bowling!
Automat - An American Brasserie/Diner in Mayfair.
Babes & Burgers - In Notting Hill.
Burger Shack - Three branches- I haven't eaten here but have heard that their burgers are good.
Ed's Easy Diner - Five Branches. I go there for their peanut butter milkshakes!
Fine Burger Co. - Five Branches. I'd like to try their Tampura battered onion rings!
Giraffe - twelve branches and growing. Very good burgers and a great place to take kids!
Haché - In Camden. Fantastic burgers, winners of Time Out's best London burger award! Their website seems to be down right now.
Hamburger Union - Four branches. Can be a bit hit and miss.
Lucky 7 -In Notting Hill. Cute American style diner
Real Burger World - Two branches. The cheapest "gourmet" burger chain.
The Ultimate Burger - Four Branches. Good burgers but certainly not the "ultimate" burgers! They do ground, chicken-breast burgers.
Check'em out and let us know what you think.
Enjoy!
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Jod