Ukrainian forces have launched a counteroffensive to retake Kherson, the largest city captured by Russia in this year's invasion. But the occupiers are redoubling their efforts to integrate the city and surrounding region into Russia - and they need the help of local collaborators. A few Ukrainians are eagerly serving the invaders. But many key workers - teachers, doctors and other state employees - are forced into a cruel choice. They must agree to work according to Russian rules, betraying their country - or else lose their jobs. Tim Whewell reports on life behind Russian lines in Kherson - and talks to some of those who've thrown in their lot with the occupiers, including the eccentric former journalist and fish inspector who's now deputy head of the region's Russian-backed administration.