Media playback is unsupported on your device Media caption Momentum supporter Owen Jones and Progress director Richard Angell on Labour candidate selection

If Jeremy Corbyn and Tony Blair were locked in a room and told to battle it out for the soul of the Labour Party who would emerge triumphant? Sadly, we will never know. The next best thing's a battle between Progress and Momentum.

For those not schooled in the intricacies of Labour politics, Blairite group Progress have been around a lot longer than Corbyn-supporting Momentum, but they don't have anywhere near as many members. There is no love lost between the two factions.

Guardian journalist Owen Jones was an early supporter of Jeremy Corbyn, and, barring a wobble when Labour had a poor by-election result, remains a strong supporter of Momentum. He thinks claims by Progress supporters that they are being "purged" from the party is ridiculous - and Progress just need to accept that their brand of politics is on the way out.

Richard Angell is a director of Progress. He claims Momentum is guilty of forcing "moderates" - that's what New Labour-types are called these days - out of the party in an undemocratic way.

The debate is running on twitter...

But for some it is all a bit incestuous and pointless...