The concern was raised as Glasgow councillors discussed a report on council efforts to boost equality.A book claiming being gay is a “sin” has been used in a religious Glasgow high school, a councillor has warned, despite efforts to boost LGBT rights. Trained teacher Fiona Higgins expressed her concern about the teaching materials being available in the city’s schools, which express views that “oppose” LGBT rights. The Labour councillor said the content had upset some “pupils” in the Catholic school while a council officer said they are working with headteachers to encourage the use of “appropriate materials” and admitted there...