Had a look at their website - A La Carte menu is not published but a "Tasting Menu" is published at 1990B per person so that's more or less 100GBP before you even open a bottle of coke Joe - and a clear expectation stated that you'll be buying "pre-dinner" drinks.
Great for a very special occasion (which this will be for you) but not your everyday nosh-up
It features "Thailand's Largest Gin Bar - so at least that raddled old lush Arsenal would feel at home
Better take about 175GBP Joe - oh and "sleeveless" shirts/beach shorts not accepted
Good luck!