This article addresses the widespread gap in formal management training across UK organisations, drawing on two surveys: Unmind's Closing the Leadership Skills Gap report (n=6,000) and the Chartered Management Institute's October 2023 Better Managers report (n=4,500+). The central argument, advanced by Unmind, the CMI, and the CIPD, is that organisations systematically promote employees into management roles based on technical competence rather than people leadership capability, producing what the CMI terms 'accidental managers.' Key findings indicate that 39% of employees doubt their manager's competence, 84% of managers received no formal people leadership training since promotion, and 35% of employees have left a job due to poor management. Independent corroboration from the CMI — finding that 82% of new managers received no formal training — lends cross-source validity to the core claim. Experts from the CMI and CIPD identify downstream consequences including reduced employee engagement, elevated turnover, and suppressed organisational productivity. The article concludes that structured, formal management development programmes are positioned as a systemic necessity rather than an optional investment. Key insights: 84% of managers surveyed by Unmind reported receiving no formal training in people leadership skills since becoming a manager, a figure closely mirrored by CMI's finding that 82% of those entering management had no proper training. 35% of employees reported having left a job due to a poor manager, with a further 33% having considered leaving for the same reason, pointing to management quality as a material driver of voluntary turnover. The 'accidental manager' phenomenon — promotion based on technical performance rather than people management capability — is identified by both the CMI and CIPD as a structural organisational pattern with consequences for engagement, retention, and productivity. Practical takeaways: Organisations that treat management as a reward for individual performance rather than a distinct role requiring people-specific skills face measurable exposure in engagement, retention, and productivity metrics. Cross-referencing employee and manager perceptions reveals alignment: both groups independently report inadequate training provision, which strengthens the internal validity of the Unmind survey's findings.