TWO groups leading the campaign to oust Jeremy Corbyn as Labour leader are facing an investigation over hacking claims.

The Blairite Progress faction and the secretive Saving Labour group, which has not declared either its leadership or funders, have been referred to the Information Commissioner’s Office (ICO) — the independent body that deals with data protection — after inciting supporters to illegally use Labour Party data in their campaign against Mr Corbyn.

Progress gave step-by-step instructions on how to harvest private information of current and former members from an official database in a breach of the Data Protection Act.