Brief summary for the perplexed: Corbyn is a member of what is conventionally called the Hard Left, Burnham is from the 'traditional' Right wing but has decent relations with parts of what is known as the Soft Left, Cooper is from the technocratic centre-Right that formed around Gordon Brown, Kendall is from the 'Blairite' Right.
Thanks. I guess Burnham is still the least worse option after all.
I'd love to see the Labour left regain the upper hand eventually, but Corbyn isn't the right person for the job. If he leads the party to defeat in 2020, the Blairites will come back in full force.