Is Jeremy Corbyn "fit for purpose" ?
I'm not British, but from what I read he has the experience and long practiced hard nosed political integrity, capable of bringing the UK forward on a solid basis. He has had a lot to put up with including multiple smears, labor leadership that was dead set against him, and now even the polls seem to be suggesting his popularity is slackening. He has had, and I suspect he continues to have the majority of the members of Labor (& not Blarites) behind him.
With eight MPs leaving the labour party to join the newly formed Independent Group and Deputy Leader Tom Watson's scathing attack on him, I don't think his political future is looking that good.