The country faces a shortage of troops in the campaign against Russia's better equipped and larger military
An email from senior government advisers to an adviser in Johnson's office written in the last ten days says the prime minister recently requested guidance on the legality of such a move, known as proroguing, the newspaper said.
The legal guidance given in the email is that shutting parliament may well be possible, unless the courts agree to demands by anti-Brexit campaigners to block such a move, the Observer reported.
"The claim that the government is considering proroguing parliament in September in order to stop MPs debating Brexit is entirely false," a government spokesman said.