I had to pay extra for hold luggage 'two large suitcases', as I had a lot of Uk food treats and presents for my Oz relatives, and customs gave me a hard time with some of the produce. Marmite and shortbread being the culprits.
Luckly I went through the red lane and declared otherwise i would have got a fine. They confiscated some stuff, and likey eat it for dinner, Cheeky Bas.....d's.