All ingredients are readily available at Tesco, Sainsbury’s, Waitrose, ASDA, and Morrisons. Arborio rice and saffron can be found in the rice or specialty spice aisles. Fresh seafood (shrimp, mussels, squid) is available at the fish counter or chilled seafood section. Fish stock, peas, fresh parsley, and lemons are in the produce and pantry sections.