Labour only need to wait and look vaguely credible as the current Johnson, Gove, Rees-Mogg, Rabb, Grayling shower of UKIP-influenced popularists are so absurdly inept, corrupt and incompetent and the prospect of making Brexit anything but an economic disaster so implausible people will likely be begging to see the back of them in four years. As such Labour just need to pick someone vaguely sensible and uncontroversial and wait. It would take a simply astounding level of wilful mismanagement to fail in this long-term scenario, though sadly I don’t put that entirely beyond the party’s current membership.