The evidence is increasingly difficult to ignore. While organisations continue to debate performance, growth and innovation, leadership capability remains one of the most underdeveloped levers of business improvement. Too many people are still promoted into management roles because they are technically strong, loyal or available - not because they have been prepared to lead others well.

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The leadership gap we can no longer ignore

The statistics make the business case hard to dismiss. The CMI found that an astonishing 82% of UK managers are “accidental leaders” - people who have moved into leadership positions without being selected for their leadership potential and without receiving appropriate leadership training.

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Meanwhile, the World Management Survey, founded by LSE, estimates that deficiencies in leadership and management capability account for around 50% of the productivity gap between Europe and the United States. The ONS has reached a similar conclusion, identifying poor people management as a major contributor to the UK's productivity challenges.

As the CMI noted in its 2023 research, “In any skilled area of modern work, you would expect people in positions of competence to receive at least minimal training. You want your plumbers to be trained; you want your cybersecurity people to be trained – well the same is true of managers.”

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It’s a simple observation, but a powerful one. We would never expect a finance director, engineer, cybersecurity specialist or surgeon to operate without training. Yet businesses routinely ask managers to handle motivation, performance, conflict, change and culture with little more than instinct and goodwill.

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The danger of the ‘illusion of competence’

The challenge runs deeper than a simple skills gap. LSE research points to what it describes as an “illusion of competence” among many managers. A significant proportion of underperforming leaders genuinely believe they are performing above average. As a result, they fail to recognise the need for development and improvement.

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Poor information and limited self-awareness create a dangerous combination. When leaders cannot accurately assess their own effectiveness, businesses are left with leadership shortcomings that remain hidden, unaddressed and costly.

 

In a competitive economy, this is not a soft issue; it’s a commercial risk. Weak leadership shows up in low engagement, slow decision making, poor accountability, avoidable staff attrition and inconsistent customer experience.

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The £76 billion opportunity

While the problem is significant, the potential reward is even more compelling. The CMI estimates that if the UK were simply to match Germany's levels of management training over the next decade, the resulting productivity improvement could be worth up to £76 billion.

 

That isn't merely a training opportunity. It is a business performance opportunity. Better leadership improves the conditions in which people do their best work: clearer priorities, stronger accountability, more constructive feedback, greater trust and faster, better decision making. Over time, those improvements translate into higher retention, better customer outcomes and stronger commercial performance.

 

That makes leadership development less of a discretionary training spend and more of a route to better business performance; in other words, an essential spend. So, the question is no longer whether organisations can afford to invest in leadership development. It is whether they can afford the opportunity cost of not doing so.

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So How Do We Change Things?

The answer is unlikely to be found solely in executive leadership programmes aimed at the boardroom. Leadership capability is built throughout an organisation. The greatest gains often come from developing first-line and middle managers - the people who translate strategy into action, shape the daily employee experience and determine whether teams feel clear, supported and accountable.

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To make meaningful progress, organisations should consider:

· Developing leadership capability from the ground up rather than focusing exclusively on senior executives.

· Working more closely with leadership coaching specialists who can support and develop “accidental leaders”.

· Making foundational leadership training a prerequisite for promotion into management roles.

· Exploring different coaching and leadership development approaches to identify what best fits their culture and objectives.

 

Most importantly, businesses should recognise that leadership coaching is not a generic training product.

 

The quality, experience, style and effectiveness of leadership coaches vary enormously. The right partner will challenge assumptions, build confidence, improve behaviours and create practical change. The wrong approach risks becoming another well-intentioned initiative that fails to shift performance.

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Leadership development is a strategic investment

The UK's productivity challenge will not be solved by technology, process improvement or investment alone. Those things of course matter enormously, but without capable managers to turn strategy into consistent execution, their impact will always be limited.

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By identifying accidental leaders early, equipping them with the right skills and creating a culture of continuous leadership development, organisations have an opportunity to unlock significant performance gains that benefit employees, customers and shareholders alike.

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The leadership gap is real. The cost of ignoring it is real too, but there are also real opportunities for those organisations willing to act now.

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Ready to develop the leaders your business needs?

The HH Partnership helps organisations turn leadership potential into measurable progress - building stronger managers, more confident leaders and higher-performing teams through practical coaching, training and development programmes.

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If you're looking to strengthen leadership capability, support emerging managers or unlock greater organisational performance, contact The HH Partnership to learn how expert leadership development can deliver lasting business impact.