Productivity at the Paris arms of US law firms is racing ahead of UK rivals, according to a new survey of the competitive French market, which shows that US partners bring in almost €600,000 (£404,220) more than their English counterparts.

The research by French publication Decideurs shows that average billings-per-partner at the local arms of US practices averaged €2.22m (£1.49m), compared with €1.65m (£1.11m) at UK firms.