PMQs Sketch: Corbyn has chalked up a century but is yet to score

All MPs are familiar with Jeremy Corbyn. The nylon tie and the charity shop jacket give him an air of respectability, of erudition even, but the unloved haircut and the whiny accent mark him out as a toxic hazard. He’s the kind of champion grumbler who shows up at every constituency surgery with sheaves of paperwork stuffed into plastic bags.