I worked at Amundsen-Scott South Pole Station for a year, looking after IceCube (big neutrino observatory). It's a US base, but science staff tend to be more multi-national as universities have much more freedom on who they can hire. One of our summer area managers (who was also British) brought a huge tub of UK Marmite which lasted most of the year, though it dried out pretty badly and would require melting in the microwave.