hereThe Government’s Scientific Advisory Group for Emergencies, also known as Sage, has previously set a target of 80 per cent.Cabinet Office minister Gove has said that contact tracing is improving 'all the time'.Labour leader Sir Keir Starmer has argued there should be a national 'circuit breaker' lockdown, and that responsibility for contact tracing should be handed to councils.It comes as leaders in Greater Manchester continue to resist the imposition of new tier three restrictions.Rachel