The central window is the Vedast Window depicting scenes from the life of the saint, including an allegorical incident in which he evicts a bear from a cave. Vedast was appointed Bishop of Arras (in France), which had previously been Christian but relapsed. The bear represents paganism, which Vedast successfully drove from the area.
St Vedast is chiefly remembered for his patience, meekness and charity. In Christian art he is depicted raising to life a goose, which a wolf had brought him in the forest - a minor miracle which anticipates St Francis of Assissi.
In England the name Vedast was gradually corrupted to Vastes, Fastes, Faster, Fauster and eventually Foster: hence the name of the church, St Vedast-alias-Foster.