BBC News Lewis Hamilton tops Australia first practice 2018-03-23T02:31:35.000000000+00:00 Lewis Hamilton is fastest in the season's first practice session for the Australian Grand Prix as McLaren hit trouble. China considers possible tariffs on $3bn worth of US goods 2018-03-23T02:22:05.000000000+00:00 China asks US to pull back "from the brink" of a trade war as it announces possible tariffs on pork, wine and fruit. Trump replaces National Security Adviser HR McMaster with John Bolton 2018-03-23T02:03:50.000000000+00:00 Defence hawk John Bolton becomes National Security Adviser, in the latest change in the White House. The Walking Dead's make-up man on the art of gore 2018-03-23T01:34:49.000000000+00:00 Greg Nicotero, the man behind some of the goriest scenes in film and TV, on the "magic trick" of blood on screen. Florida shooting: Why I'm marching on Washington DC 2018-03-23T01:32:38.000000000+00:00 Nikki is a 17-year-old student at Marjory Stoneman Douglas High School in Florida. This is why she is marching for her life. Spot the difference - Damien Hirst's new vision 2018-03-23T01:16:49.000000000+00:00 Damien Hirst returns to a familiar theme - but this time, the leopard has changed his spots. Four in 10 online GP firms not safe, say inspectors 2018-03-23T01:10:47.000000000+00:00 Care Quality Commission warns of inappropriate prescribing and failure to carry out checks. May urges 'new dynamic' in Brexit talks 2018-03-23T01:04:10.000000000+00:00 EU and UK must push ahead to find "workable solutions" to problems, the prime minister says. 'Highly likely' Russia behind attack - EU leaders 2018-03-23T01:01:09.000000000+00:00 "There is no plausible alternative explanation", the European Council says after an evening of talks. Quiz: Why is Footloose news this week? 2018-03-23T00:47:33.000000000+00:00 7 days quiz: It's the weekly news quiz - have you been paying attention to what's been going on in the world over the past seven days?