lebanon risks being the battleground in the fight between the saudis and iran for regional supremacy. saudi arabia has told its citizens to leave lebanon immediately and not to travel there from any country. uber is due to find out the outcome of its appeal against a ruling on the employment rights of its drivers. two drivers won a landmark case against the cab—hiring app last year after arguing they were employees and entitled to the minimum wage, sick pay and paid holiday. uber challenged the ruling, saying it could deprive drivers of the "personal flexibility they value". more than half of schools in england fail to offer computer science gcse, according to a new report by the uk's leading science academy. the royal society is calling for a ten—fold increase in funding for computing education, which it says is patchy and fragile. here's our technology correspondent, rory cellan—jones. what effect does a binary shift left and a binary shift right have? in a classroom in saint albans, some budding young computer scientists are deep in their gcse course. this school is in a mino