The delay in publishing Keir Starmer's long-awaited plan on defence spending has undermined the UK's credibility and left the country less safe, a parliamentary committee has warned.

The Prime Minister has been under growing pressure to unveil the 10-year defence investment plan (DIP), which was originally supposed to be published last autumn.

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…