UK correspondent Rob Watson looks at the Makerfield by-election which could return Greater Manchester mayor Andy Burnham to Parliament for a Labour leadership contest. Former Labour PM Tony Blair has put his thoughts on the leadership issue into a 5,700-word scathing assessment of where the party is at. Rob also has the latest reports on the vetting of Peter Mandelson and how a possible social media ban is shaping up. Rob Watson is a BBC political correspondent