this is bbc news broadcasting in the uk and around the globe. i'm ben brown. our top stories. the british pm warns that russian is planning the biggest conflict in europe since world war two. borisjohnson, says plans for an invasion of ukraine may have already begun. i am afraid to say that the plan that we're seeing points to something that could be really the biggest war in europe since 1945, just in terms of sheer scale. it comes as russia and its ally belarus take part in huge military exercises, just 160 kilometres from ukraine's border the legal requirement to self—isolate after catching covid in england is expected to be dropped from next week — as part