I bring the car over from Belgium, so tea bags, peanut butter, bacon, rolled pork shoulder, smoked haddock, sausages, curry sauces from my butcher, bramleys, purple sprouting broccoli, Lurpak, crumpets, creamed horseradish, joints of beef, a ham at Christmas, cheddar, red Leicester, double Gloucester, rice (cheaper in Tesco), loose spices from the whole food shop, blocks of creamed coconut, magazines, Daily Telegraphs, Sunday Times, clothes, shoes, M&S or Tu knickers, shampoo, shower gel, Boots face serum. Berocca tablets, Vanish.
If I'm over, it's cheaper to stock up on some things than pay the prices at the British store here, and some things you just can't get here.