Workers occupying two plants and picketing a third closed this week by Visteon, the former supply arm of Ford Motor , are threatening to make Ford’s UK operations the next target of their anger.

Banners spray-painted with the words “Ford sellout” and “Ford and Visteon pay up!” deck the gates of Visteon’s plant in Enfield, which has been occupied by up to 40 workers at a time since Wednesday.