Get the stories that matter to you sent straight to your inbox with our daily newsletter.More than a third of Renfrewshire schools say there are “obvious deficiencies” in Covid-19 safety measures in classrooms as a further two schools confirm cases.Gleniffer High School, in Foxbar, and St Anthony’s Primary, in Johnstone, have both identified Covid-19 positive cases in the past 48 hours.NHS Greater Glasgow and Clyde said students who had been in close contact with the infected person at both schools had been asked to self isolate, while insisting it was safe for all other students to attend as normal.But Renfrewshire’s largest teachers’ union has told the Express that 33 per cent of its local representatives have reported “obvious.