you are watching bbc news. the headlines: provisional clinical trials of a new experimental drug for severe covid suggests it cuts the risk of hospitalisation or death by about half. if authorised by regulators, the new drug which is a pill, would be the first oral antiviral medication for covid 19. after the murder of sarah everard, the british prime minister has urged the public to trust me police despite the revelation that her police that her killer wa5 despite the revelation that her police that her killer was a serving officer. bori5johnson serving officer. boris johnson said serving officer. bori5johnson said the government was examining how cases of violence against women are handled. and the volcano that has been erupting for over a week on the spanish i5land erupting for over a week on the spanish island of la palma i5 spewing out two new 5tream5 spanish island of la palma i5 spewing out two new streams of lava, threatening further disruption that destruction and forcing thou