Gin is big in Spain. And so is the way they serve it. The instantly recognisable Gin Tonica is extravagantly served in a large fishbowl glass with generous mountains of ice and a tempting array of garnishes. Now one of Spain’s signature serves is making it big over here too with The Distillery’s Gin Tonica Bar launching last year. But if you can’t make it over to Spain, or indeed to West London, David T. Smith has just launched his own Gin Tonica book to help you make your very own Spanish cocktails at home.