22:00Biggest Russian bombardment on Ukraine yetHead of NHS test and trace denies system is failingBBC Radio 4 Duration: 45 minutes Thu 17th Sep 2020, 22:00 on BBC Radio 4 LWAvailable for over a yearListen nowIn depth reporting, intelligent analysis and breaking news from a global perspective.GenresNewsBrandBiggest Russian bombardment on Ukraine yet Source: BBC Online