more violence in paris tonight as tens of thousands of people are out on the streets again across france to protest against president macron s pension reforms. everyone, say hi to luke! and the 22 year old singer songwriter who found himself on stage in front of 20,000 people with ed sheeran. and on bbc london. are billionaire s son who fled to yemen after a murder investigation admits to the bbc that he was involved. good evening and welcome to the bbc news at six. the terrorism threat level in northern ireland has been raised from substantial to severe meaning the risk of an attack is now highly likely . the rating is based on an mi5 intelligence assessment and comes after a rise in activity by dissident republicans, including a gun attack last month on a senior police officer. the northern ireland secretary, chris heaton harris, says the public should remain vigilant, but not be alarmed. 0ur ireland correspondent, emma vardy, sent this report from belfast. the attack