River warfare in Ukraine

Ukrainian troops are having to risk their lives, crossing icy waters, to defend small islands used for little more than holiday homes.We hear why these small marshy patches of land are strategically crucial to protecting Ukraine’s biggest gain so far in the war, while Professor Michael Clarke explains the latest developments across the country.The UK’s creating a new Arctic operations base, and Sitrep reporter Briohny Williams tells us exactly what it’s like to be there for training and exercises.Sarah Louise Miller shares the story of thousands of women who overcame huge resistance to become key players in British military intelligence during World War 2.