The X-Ray holiday series continues with an investigation into claims that cheap sunglasses can damage eyes. We bought sunglasses costing between £1 and £10, and carried out scientific tests on them. Lucy Owen investigates a bus company which lost a passenger's luggage and didn't pay compensation. We get some expert advice on how to keep your picnic fresh and safe to eat on a blazing summer's day and get some tips on saving money when you hire a car on holiday. Could fishing help families while away those long summer days? Omar Hamdi gives it a go.