When Kimchee Restaurant opened up in Holborn in 2011 it was one of the few Korean establishments in London to invest really heavily in the decor and fittings. Their second restaurant, recently opened behind St Pancras station, continues the trend. It also has table-top BBQs, and I hear they had some half-price deals to celebrate their opening, though I think those might have finished by now. Got to be worth a visit, though.
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