Future of the armed forces to be decided 'on Monday' Prime Minister Boris Johnson has pledged to deliver the Type 26s and Type 31 frigates - whilst troubling new reports suggest HMS Monmouth and HMS Montrose may face the axe Updated The video will auto-play soon8Cancel Play now Key decisions concerning the future of defence in Plymouth are expected on Monday after Prime Minister Boris Johnson hailed the release of the Government's Integrated Review into the future of the armed forces. Defence minister Johnny Mercer says Plymouth has "only ever seen greater investment" in the city since he became MP after the mammoth 100 page dossier was thrashed out today.