Current statusUnclear
GBK's own menu states a discretionary service charge of 12.5% may be levied, and to check in restaurant for details — which stops short of confirming it is added to every bill.
Food hygiene rating5 out of 5Rated 2025-03-04 · Food Standards Agency, under the Open Government Licence
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Been to Gourmet Burger Kitchen recently? A quick report helps the next person avoid an awkward moment.
Service charges are always optional under UK consumer law, whatever's listed here: you can ask for it to be removed.