Downing Street had hoped to publish the Defence Investment Plan this week, amid dire warnings about Britain's ability to defend itself from Russia and other foes.

Britain faces increasing threats from Russia. The nation's military chief stresses the urgent need for more defence spending. The Defence Investment Plan, outlining military…

The Defence Investment Plan (DIP) was expected last year but may not be published until July - experts warn the UK needs significant spending to close big holes in its defence