Are there clues as to a new leader's prospects for success with the wider electorate to be found in the way their party goes about choosing between rival candidates? (theguardian.com)
He would have a track record on making this type of progress and the fear of a divisive leadership election would be used to discourage rival candidates supporters declaring publicly. (labour-uncut.co.uk)
Unite and Momentum are expected to back rival candidates for the battle to become Lewisham East's next Labour MP, the Guardian has learned. (theguardian.com)