Digital is accounting for 75% of Taylor & Francis' parent company Informa's publishing sales, as it revealed half-year profits increased by 14.3% to £55.2m.
For the first half of 2011, Informa's sales increased by 1.7% to £634.8m. When adjusted for acquisitions, disposals and currency fluctuation, sales increased 0.3%, which Informa dubbed organic growth.
Chief executive Peter Rigby said: "Whilst many global growth indicators remain a concern for a sustained economic recovery, the resilience of our publishing activities and larger events underpin our confidence around our full year outlook. Furthermore, the more cyclical areas of our business are growing and we are confident would grow faster in a better economic environment."
He added: "The group remains focused on generating top line growth through a continued emphasis on innovation across all its businesses. Despite economic headwinds, overall trading remains in line with our expectations for the full year."
Discussing its publisher performance, Informa said its academic information business, which includes academic publisher Taylor and Francis, performed ahead of expectations. It said books performed well versus a "very strong" 2010. In its academic wing, sales increased 2.5%, or 5.1% organically, to £145.1m for the period. Adjusted operating profit was up 3.3%, or 5.5% organically, to £47m.