We can't stand wasps but when it comes to bees we're far more welcoming: Sure don't they make honey after all? These little buzzing brats are worth hundreds of millions to Britain's agriculture sector, and a third of the food that comes from across the water is reliant on pollination. That's why it's worrying that their numbers are dropping. Journalist and beekeeper Bill Turnbull wants to find out why, so he examines the evidence in a bid to determine what is responsible for the decline and meets scientists who are fitting radar transponders to the insects to establish why numbers are falling.