Revenue
Group underlying revenue growth was 8% with all four market segments contributing to underlying growth. The underlying growth rate reflects strong growth in electronic and face-to-face revenues, partially offset by continued print revenue declines. Risk continued to deliver strong growth, STM maintained its improved growth, and Legal growth continued to improve. Exhibitions saw strong growth in revenue due to higher activity levels.
Acquisitions and disposals together had a broadly neutral impact on revenue, while exhibition cycling effects decreased growth, giving total revenue growth at constant currency of 7%. The impact of currency movements was broadly neutral to growth. Reported revenue, including the effects of exhibition cycling and currency movements, was £9,161m (2022: £8,553m), up 7%.
Profit
Group underlying growth in adjusted operating profit was 13%, with growth in each of Risk, STM and Legal in line with or ahead of revenue growth, and the improvement in profitability in Exhibitions reflecting the increased activity levels and the lower cost structure.
Acquisitions and disposals combined had a small negative impact on adjusted operating profit growth, giving growth at constant currency of 12%. Currency effects increased adjusted operating profit by 1%.
Total adjusted operating profit, including the impact of acquisitions and disposals and currency effects, was £3,030m (2022: £2,683m), up 13%.
Operating costs on an underlying basis grew 5%, reflecting investment in global technology platforms, the launch of new products and services and the increased activity levels within Exhibitions, partly offset by the benefits of continued process innovation. Actions continue to be taken across the group to improve cost-efficiency. Total adjusted operating costs, including the impact of acquisitions, disposals and currency effects, were also up 5%.
The overall adjusted operating margin was 33.1% (2022: 31.4%). On an underlying basis, including cycling effects, the margin improved by 1.7 percentage points with portfolio changes reducing margins by 0.2 percentage points and currency movements improving margins by 0.2 percentage points. EBITDA margin also improved, by 1.6 percentage points, to 38.7%.
Reported operating profit was £2,682m (2022: £2,323m) up 15%, primarily reflecting the increase in adjusted operating profit and a lower amortisation charge in respect of acquired intangible assets.
Adjusted net interest expense was £314m (2022: £194m), with the increase primarily reflecting higher average interest rates and a charge of £26m in respect of the early redemption of bonds that were due to be repaid in August 2027.
Adjusted profit before tax was £2,716m (2022: £2,489m), up 9%. Reported profit before tax was £2,295m (2022: £2,113m) also up 9%, reflecting the improvement in reported operating profit, the higher interest expense, an impairment charge for some assets held for sale within Risk and a net downward valuation of the Ventures portfolio.
The amortisation charge in respect of acquired intangible assets, including the share of amortisation in joint ventures and associates, was £280m (2022: £296m).