A ban on leaving the local area for at least four weeks could be among new coronavirus measures being brought in tomorrow, according to reports this morning.Northern leaders, including the Mayor Andy Burnham, are locked in negotiations with the government over the new rules.Prime Minister Boris Johnson reportedly signed off an agreement for a simplified, three tier system of local lockdowns for regions in England this week.They are said to be 'medium risk', 'high risk' and 'very high