About CoreInsight
Where finance expertise meets modern data analytics
Meet the Founder
Turning financial data into strategic insights
Teslim Adeyanju
ACA, Xero Advisor Certified | Financial Data Analyst
CoreInsight was founded by Teslim Adeyanju, a Chartered Accountant (ACA) and Xero Advisor Certified professional with more than a decade of experience at the crossroads of finance, accounting, and data science.
Teslim's career began with core accounting and finance—preparing management accounts, building forecasts, analysing variances, and ensuring compliance. Over time, he expanded into data analytics and machine learning, combining the rigour of accounting with the power of technology. This blend allows him not only to report the numbers but also to uncover the stories behind them and translate insights into strategy.
He holds an MSc in Finance and Investment Banking (Distinction) from the University of Hertfordshire, where he ranked in the top 5% of his cohort. His expertise spans financial reporting under IFRS/UK GAAP, predictive analytics with SQL, Python, R and machine learning, and building real-time dashboards with Power BI.
Teslim currently serves as Treasurer on the Board of Trustees at Asylos, a UK-based charity that provides research to support asylum claims. In this role, he manages budgets, forecasts, and restricted funds, while also designing board-level dashboards that improve transparency and governance.
Our Story
The Gap We Fill
CoreInsight Financial Advisory Ltd helps small and medium UK businesses turn raw financial data into clear, actionable insight.
Many SMEs rely on manual Excel-based processes, static reports and limited analysis. They face slow month-end reporting, limited visibility into profit and cash flow drivers, weak forecasting and fragmented systems.
Our Approach
We bridge the gap between traditional chartered accounting expertise and modern data tools like SQL, Python and Power BI. We help clients move from reactive reporting to proactive insight.
Our Mission
To help organisations make better financial decisions by combining rigorous accounting with modern data analytics and automation.
Our Values
Accuracy & Integrity
Financial data must be right. We validate outputs and build robust solutions you can trust.
Clarity
Insight is only valuable if people can understand and act on it. We focus on clear communication and simple visualisations.
Innovation
We use modern tools and techniques to solve old problems in better ways, staying current with the latest in data analytics.
Collaboration
The best solutions come from working closely with you. We listen, ask questions, and build solutions together.
Our Vision
Becoming a leading UK finance analytics advisory firm
Our vision is to become a leading United Kingdom finance analytics advisory firm that mid-market organisations trust for clear, technology-enabled financial insight.
We are building a library of scalable analytics solutions and dashboard templates specifically designed for mid-sized UK businesses. By combining reusable components with tailored implementation, we deliver faster results at lower cost—helping more businesses get the insight they need to grow with confidence.
Over time, we are transitioning from pure consulting to a mix of consulting and subscription analytics services, making high-quality financial reporting accessible to companies that may not have the budget for enterprise consulting firms.
Want to work with us?
Get in touch for a free initial conversation about your business and how we can help.
Book a consultation