In Britain today, there are 3.7 million EU workers. But in the wake of the Brexit vote, the number of new arrivals has plunged, giving us a taste of what life without migrants might be like. Reporter Seyi Rhodes travels across the UK in the run-up to Brexit to find out what's happening in key sectors of the economy: agriculture, social care and healthcare. The Leave campaign painted a lurid picture of a land swamped by cheap migrant labour.