Gourmet Burger Kitchen is a British hamburger chain featuring a wide variety of gourmet burgers and salads. All panko-breaded chicken products are Halal and some lamb products may also be Halal. Check with individual stores for details. Nearest Tube: Tower Bridge. 

Gourmet Burger Kitchen (GBK)

This spot simply knows how to please their clients. Regularly with a very nice mindset. The food is affordably priced, always tasty and clean.

Found the place randomly because the location,  and as I try burgers in every country I thought I must try here. 
I go to local places , not often to food chains so wasn't really expecting any good tbh 
It was really nice , very tasty,  nice Falafel and as everybody recommended the onion rings they was also great 
The staff speaks also Spanish what is great as is thousands of Spaniards visiting.
The only thing is that the salsa for the Falafel had a lot of Tabasco and I extremely love spicy food but my friends don't so they eaten them without any salsa. Should be a option. 
Everything else , perfect

Decent burgers at a reasonable London price. Can recommend the chicken wings as a starter. Nice and convenient service using the app.

Lovely burgers cooked to the point of your choice. Very good quality ingredients and juicy beef. There's not much else you can ask for from a burger place. The fries where crispy on the outside and soft on the inside. They serve some fizzy drinks with free refills. I also really liked the vibe of the place: cozy and staff is super friendly. I would love to visit again.

Good location and great vibe. But the burgers are far from gourmet. I’d say they are good burgers, but not gourmet. And the rolls are not fresh. I expect a burger to be served on a roll that was baked that same morning, these definitely were not.

Institute of Islamic Jurisprudence has certified this establishment as offering one or more halal options.  Per April 10, 2011 GBK website, the chicken used for burgers is Halal and is cooked in 100% rapeseed oil in a fryer specified for chicken only, however the grilled chicken used for salads and kebobs are cooked on the same grill as the bacon. The beef, lamb, and venison are not Halal. GBK does not offer Halal Grilled Chicken as an option.

website:zabihah.com:(https://www.zabihah.com/biz/fN4LSUuTWC)

Halal Status for Gourmet Burger Kitchen Tower Hill