Guido hears a row is breaking out over Labour members’ personal data, in the latest skirmish between the party’s HQ and Jeremy Corbyn’s campaign team. Jon Lansman, the boss of the Momentum Corbyn cheer-leading organisation, is having a barney with Labour’s legal team over his group’s apparent grab of members’ email addresses, telephone numbers and postcodes. As Guido noted last month, Momentum claims to be able to contact all the people who signed up to support him during the leadership contest. They say they are a stand alone company which is separate to the Labour Party, so any transfer of personal data from Corbyn’s leadership team would appear to be a breach of the Data Protection Act:

“individuals should generally be able to choose whether or not their personal data is disclosed to another organisation”

Labour MPs are furious and plan to write to the Information Commissioner to ask him to investigate if Momentum have broken the law. They point out that the maximum fine for serious breaches affecting thousands of people is a cool half a million quid…