Force India drivers Adrian Sutil and Vitantonio Liuzzi have joined reigning F1 champion Jenson Button in pledging not to eat 'foie gras', a French delicacy which has created a stir because of controversial production methods.

According to a statement by the People for the Ethical Treatment of Animals (PETA), Formula One boss Bernie Ecclestone's daughter Tamara wrote letters to the F1 drivers, requesting them to shun the dish.