Should the driving age be increased? The tragic deaths of four teenage friends during Road Safety Week have brought renewed calls for the law to be changed.
Missing boys found dead in submerged car
Young victims: British people can drive at 17, or 16 if they are registered as disabled. Glossary
Snowdonia - A mountainous region in northern Wales. It is called Eryri in Welsh.
Niger - A landlocked country in West Africa. It has a population of 25 million.
EU - European Union. An economic and political union of 27 countries.