Top stories this PM: Novavax 90% effective; UK extends lockdown; Reality Winner is free

Good evening. Here are the top stories so far today.For more daily and weekly briefings, sign up for our newsletters here.What happened today:Some good vaccine news. Biotech company Novavax said its coronavirus vaccine succeeded in a final-stage clinical trial, demonstrating 90% efficacy at preventing COVID-19. Data from the study will allow Novavax to submit the shot to US regulators, which it plans to do by the end of September. Nearly 65% of the adult population has received at least one dose