The number of people to have tested positive for coronavirus in Bolton has increased for a fourth week in a row – but the mayor of Greater Manchester says a full local lockdown of the region is not yet necessary.There were 27.1 positive tests of COVID-19 per 100,000 people in the borough in the seven days up to August 8, rising from 23 the week before.Bolton is following the general trend in Greater Manchester – although Oldham has shot up to 108.8 and Wigan remains much lower at 7.3.The