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.