on twitter @annitabbc and use the hashtag #bbcyourquestions. a 44 year old man has been arrested on suspicion of murder following the fatal stabbing of thomas o halloran on a mobility scooter in west london. rail workers are on strike once again in their dispute over pay causing widespread disruption to the network across england and wales. only about 20% of the usual train services are running around the country and finishing much earlier than normal as the latest wave of strikes hit the railways. and a winning streak for emma raducanu, who picked up where she left off after beating serena williams to thrash victoria azarenka in cincinatti. good morning and welcome to bbc news. pupils across england, wales, and northern ireland are getting their a level, t level, and btec exam results. we are rooting for you. these students are the first cohort to sit exams since before covid 19. grades reached record highs last year during the pandemic when they were determined by teach