How Greens could pressure Burnham on electoral reform - as they warn he won't 'walk seat'

The Green Party could use a by-election to pressure Andy Burnham into committing to electoral reform if he becomes Labour leader in the future.

Source: https://news.sky.com/story/greens-plan-to-pressure-andy-burnham-to-support-election-reform-as-they-warn-he-wont-walk-any-potential-by-election-13543858