Mumsnet is a massive website, used primarily by (millions of) women, particularly from the UK. Any British politician who doesn’t engage comprehensively with questions about women and children during a MN Webchat is pretty much pissing about on the sidelines of debate before scoring an own goal. It happened to Penny Mordaunt and now it’s happened to Keir Starmer. This is especially noteworthy given that before the webchat, Keir Starmer was very much a favourite with many of the left-leaning MN members.