In other news, ministers fear Britain will have a six-week window to open up in the summer or risk having Covid restrictions in place until spring, the Sunday Telegraph reports. Government advisers have explained there is a “ticking clock” to lift measures before it becomes too late to do so in September because of the greater transmission of Covid in winter and seasonal pressures on the NHS. It comes as Prime Minister Boris Johnson gave his clearest signal yet that he is planning to delay the return to normality by a month.