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.
The idea for Gourmet Burger Kitchen originated in New Zealand. Innovative New Zealand cuisine over the last five years has extended to incorporate 'food on the go' such as burgers. Where once the traditional burger was seen purely as a fast food option, gourmet burgers have knocked tradition on the head. Gourmet Burger Kitchen has created a nutritious sophisticated product using the best and freshest ingredients available.

Prince Charles Drive

121 Lordship Lane

200 Haverstock Hill

44/46 The Brunswick Centre

24 Jubilee Street

2 Tower Place

45 Greenwich Church Street

Westfield Shopping Centre

131 Chiswick High Road

42 High Street

84 Clapham High Street

88 The Broadway

45 Topsfield Parade

44 Northcote Road

333 Putney Bridge Road