Defence blocks access to advice on location choice for Australia’s nuclear submarines base

Labor demands government reveal how it shortlisted Brisbane, Newcastle and Port Kembla as potential sites for base

Voters will be kept in the dark on how Scott Morrison's government selected three potential bases for Australia's planned nuclear-powered submarines, after the advice was blocked from release.

With the prime minister preparing to formally call the election within days, Labor demanded the government reveal how it shortlisted the locations to prove the announcement was not just a marketing ploy".