dpensable weome to "obal 300" where this wee we' investiting the uncomfortable realities of e modernorkplace. ze hours, ro guaraees --ntroversl employnt contracts in the u.k. driven to distraction -- self-employed couriers get a raw deal in the u.s. and of bulls and bees -- everyday survival in ethiopia's sheka forest. ♪ a zero-hours contract. work zero hours, and get paid anyway. yes, please! sadly, however, it does not actually work like that. in reality, zero-hours contracts, of which there are currently around 1.5 million in the u.k., mean that employees have to keep themselves available in return for no guaranteed hours, no guaranteed salary, no guaranteed employment, which goes some way to explaining why so many britons are struggling to make ends meet, despite the lowest unemployment figures since the global recession began. welcome to life in the u.k. have you got your cv ready? because we are off to the job center. reporter: despite low unemployment figures, it's "all go" at this central london job centre, even on an average weekday. for many people, short-term contracts with minimu