Starbucks has today launched Cold Brew in three central London stores, ahead of a roll-out to 30 sites. The new-format drink, which involves the process of steeping coffee grounds in cool filtered water for 24 hours, is now available in Kingsway, Great Portland Street and St Martin’s Lane. The arrival begins the roll-out of the drink and Starbucks is the first coffee chain in the UK to bring the new-style drink to the high street.To create the pure, high-quality iced beverage, baristas will use coffee beans – currently the Guatemala Antigua variety – to brew small individual batches at each store.Mark Fox, chief executive of Starbucks UK, said: “Inspired by the US West Coast, we’re proud to bring Starbucks Cold Brew to the UK. We love bringing new experiences to Starbucks customers and trialling new initiatives that get our fans excited.“We have always offered a wide range of products to make sure all of our customers can find their favourite coffee at Starbucks. As a result of our coffee innovation, it’s great to be able to bring a new coffee experience to existing customers and newcomers alike.”The launch of Cold Brew coincides with the London Coffee Festival, where Starbucks is showcasing its future design direction influenced by its Seattle Roastery. Cold Brew can be customised with flavoured syrup for sweetness, extra milk and a foam milk topping for a creamy drink.