The Markit Flash France Composite Output Index, based on around 85% of normal monthly survey replies, registered 52.8, compared to November's reading of 51.4. The latest reading pointed to a solid rate of growth that was the best in a year-and-a-half.

Commenting on the Flash PMI data, Alex Gill, Economist at IHS Markit said: "According to latest survey data, the French private sector grew at a solid rate in December. Underpinning the expansion was a marked rise in manufacturing output, driven by stronger domestic and foreign demand conditions. Service sector activity also improved, albeit to a lesser extent. In turn, firms hired additional staff members for the second successive month. Encouraging signs for France as the country seeks to combat a high level of unemployment."