Women have comprised a large portion of the partner promotions at three City firms.

At least half this year's new partner promotions at Mishcon de Reya and Fieldfisher are women. At Stephenson Harwood, they represented 40 percent of the new intake.

Mishcon has made up seven lawyers, with four women (57 percent) making the cut, while Fieldfisher, in its largest promotions round on record, bumped up 14 to partner, half of whom were female. Both are among the best diversity showings so far this year in the City.