Growing up by the seaside, it's no surprise that Jack considers fish and chips the ultimate British dish. While the Stein family have a host of fish and chip restaurants, Polly and Jack choose to indulge in the east end of London's best, Poppies. Here Polly reveals the meal's origins, how the fish met the chip and all about its upgrade from street stalls to restaurant seats. Back in Cornwall, Jack cooks his recipe of fish and chips, confidently touting it as the best one that can be found in the country. He perfects the chips, tenderly mushes the peas and gives a blow by blow breakdown of how to make the most moreish crispy batter. Keen to make this mission more challenging for himself than it already is, Jack takes the dish to a city two hours from the coastline, Croatia's capital Zagreb. Lack of access to fish means the locals often preference meatier dishes and he takes his concerns to Executive Chef Marinko Topalovic, of Canopy by Hilton.