Jeremy Corbyn backs greater public ownership for Labour per BBC News

The BBC report http://www.bbc.co.uk/news/uk-politics-33839819 this:

'Labour should not shy away from putting "necessary things" in public ownership as it establishes its future direction, leadership hopeful Jeremy Corbyn says.

He told the Independent on Sunday the party could restore its commitment to public investment in areas such as rail, either "restoring the Clause IV" or using a different one.'

No mention of how the state would pay for the assets that it would nationalise but then why would the BBC report negatively about any left wing Labour politician?