See retailer website for full terms

A valid MOD90 / Armed Forces ID is required at GBK at the time of purchase to redeem this discount. This offer is only valid at our GBK UK mainland restaurants. The 15% discount is redeemable against the food bill only. This offer cannot be used in conjunction with any other offer or app voucher. Why not take a look at our Lux Rewards refer a friend code for great perks when you eat out.