UK Members of Parliament (MPs) have expressed serious doubts about the combat readiness of the £6.3 billion Ajax armoured vehicle, citing significant crew safety concerns related to noise and vibration. The Public Accounts Committee (PAC) criticized the Ministry of Defence (MoD) for having 'unrealistic expectations' regarding the safe operation of the vehicle in combat scenarios. Originally expected to be operational in 2017, the Ajax has faced numerous setbacks, including a halted exercise last November due to soldiers experiencing adverse symptoms. The PAC highlighted the impracticality of requiring soldiers to perform maintenance checks after every stop, questioning the vehicle's utility on the battlefield. Additionally, MPs criticized the MoD for delays in publishing its defence investment plan (DIP), originally due last year, which now may not be released until July. The absence of this plan has raised concerns about the UK's military credibility and safety. Prime Minister Sir Keir Starmer has assured that the DIP will be finalized before the NATO summit starting on July 7, while the MoD has committed to increasing defence spending significantly.