Labour’s ruling body is mounting a Court of Appeal fight to stop 130,000 new members being allowed to vote in its leadership election. We’re carrying live updates from 10.30am at the London hearing which will cost Labour members tens of thousands of pounds.
Blair ally Lord Falconer has backed the legal fight against five members who crowdfunded a test case allowing them to vote.
But Shadow Chancellor John McDonnell said it was undermining democracy and pointed the finger of blame at deputy leader Tom Watson.
Get your head around what the legal fight is about with our full guide here – and follow live updates below.