Last week I visited Gourmet Burger Kitchen (GBK) in Covent Garden, to my surprise they actually have a really decent gluten-free menu!
The usual gluten-free option in burger places is the "bun-less burger", exactly what it says: the burger without the bun, and usually not much else unfortunately! So when I asked about gluten-free options at GBK I was more than happy to be told there was a completely separate gluten-free menu, complete with a gluten-free bun for all burgers.
I opted for the blue cheese burger with a slice of Gorgonzola and, of course, the gluten-free bun. The bun itself was quite tasty and certainly a refreshing change to be able to eat a burger without a knife and fork.
Although predominantly London based, GBK seem to be expanding elsewhere throughout the UK, definitely worth a visit if you're after a quick bite to eat.