Yes LUHE! "Traditional Labour Values" have been lost for a long time, even if you go back as far as Harold Wilson, he was more about winning elections than about the working man, though he was a bit more connected to the working man, but he was educated etc etc.
I don't think it is necessary ,or even preferential for a Leader of Labour to be a person born to a poor working class family, and never had the chance of a good education, why would that be helpful, apart form having a natural empathy for the same type of people.
A Leader needs to be a REAL Democratic Socialist, and make sure the top end of the Party is peopled with like minded ones. If that does not happen, Labour is finished as to ever getting Elected. A Modern Day Tony Benn would do.
Of course, such a person would have to know how to deal with the inevitable smears and lies from the MSM etc. and be able to communicate and connect with people of ALL backgrounds.